sync.blue® Android-Synchronisation

Sync Android contacts with Outlook, CRM and 80+ integrations

A colleague calls your mobile and you only see a number? sync.blue® automatically syncs your Android contacts to every smartphone, phone system and CRM — for reliable caller ID resolution!

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sync.blue® is successfully used worldwide by renowned customers from various industries.

Outdated phone numbers, duplicate entries, manual upkeep across multiple systems — anyone working with Android knows the pain. sync.blue® keeps all your contacts automatically in sync, bidirectionally, and without ever exporting your data.

How does sync.blue® keep your Android contacts clean and your communication efficient?

Right now

  • !Contacts fall out of date across phones, CRMs and address books, faster than anyone can keep up.
  • !Customers and colleagues call in, but your phone shows nothing but the number.
  • !Onboarding a new colleague means copying contact lists into every system by hand.
  • !Edits made in one tool never reach the others, and your data quietly drifts apart.
  • !Compliance audits get tough because contact data lives in too many places with no clear owner.

With sync.blue®

  • ✓All contacts stay automatically up to date on every device and in every connected system.
  • ✓Caller ID shows the right name on smartphones, desk phones and your PBX, without any manual upkeep.
  • ✓New colleagues get every contact instantly, so onboarding shrinks from days to minutes.
  • ✓Built-in duplicate detection keeps your address books clean.
  • ✓GDPR-compliant data flow, hosted exclusively in ISO 27001-certified data centres in Germany.
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What concrete benefits does sync.blue® bring to my role?

Right now

  • !Scattered Android contactsstaff phones each hold a different, outdated copy of the company address book
  • !Manual contact pushespasting new hire and customer numbers onto every Android handset eats hours
  • !Stale numbers everywherea changed mobile number lingers on dozens of devices long after the source is updated
  • !Groupware-to-mobile gapMicrosoft 365 and Google contacts never reach the team's Android phones automatically
  • !Offboarding cleanupremoving a leaver's synced contacts from shared Android devices is a tedious one-by-one chore

With sync.blue®

  • ✓One-time setupwire contact sync to Android once and let it run for the whole team
  • ✓Always-current phonebooksevery Android device reflects the latest contacts without manual touches
  • ✓Fast onboardinga new employee's Android phone fills with the right contacts on day one
  • ✓Clean offboardingsynced contacts drop off shared devices when someone leaves
  • ✓Bridge groupware to mobilepush Microsoft 365 and Google Workspace contacts straight to Android

Right now

  • !No caller IDincoming prospect calls show only a number on the Android screen instead of the contact name
  • !Contacts stuck on phonenew leads saved in the Android address book never appear in the work email or CRM
  • !Manual re-typingcopying customer details from the CRM into the Android phone before every site visit
  • !Outdated numbers on the roadthe Android contact still shows an old mobile after the customer changed it elsewhere
  • !Duplicate entriesthe same client appears two or three times across the Android address book and groupware

With sync.blue®

  • ✓Every contact on the phonenew CRM and groupware contacts appear automatically in the Android address book
  • ✓Name on every callincoming customer calls display the right name and company for instant recognition
  • ✓Zero manual entrycontact details flow to Android without copying or re-typing anything
  • ✓One clean address booka single deduplicated contact list shared across Android, email, and CRM
  • ✓Always-current detailsphone numbers and addresses stay up to date on Android after any change

How do I set up Android contact sync in 3 steps?

STEP 01

Connect Android

Connect your Android account.

STEP 02

Pick destination

iOS & Android via sync.blue® MOBILE Storage, Outlook, Gmail, Salesforce, HubSpot and 80+ more.

STEP 03

Let it run

sync.blue® syncs at your chosen interval or whenever you trigger it manually.

Review
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Konstantin Kriger · LIQUITCOM GmbH
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What can I use Android contact sync for in practice?

Use case 01

Push CRM contacts to field sales reps' Android phones

A field sales team works almost entirely from Android smartphones, while every customer record lives in Salesforce, HubSpot, or Pipedrive. Reps need the right phone numbers on the Android so that an incoming call from a key account shows the contact's name instead of an unknown number, but copying records by hand is unrealistic for hundreds of customers.

sync.blue® connects the CRM directly to each rep's Android address book through its hosted CardDAV mobile endpoint, mapping names, phone numbers, email addresses, and company fields into the format the phone expects. On every scheduled run it pulls the latest customer records and writes them to the device, so a rep who lands a new account sees that contact appear on their phone without touching the CRM export tools. Incoming calls then resolve to a real name and company, and reps can dial straight from their contacts even with no CRM app open.
android crm contact sync salesforce to android contacts hubspot android address book pipedrive mobile contacts field sales android sync
Use case 02

Distribute the company directory to a fleet of Android devices

An IT admin manages a fleet of corporate Android phones and wants every employee's name, mobile number, and email from the Microsoft 365 Global Address List or Google Workspace Directory to land in each device's contacts. Without an automated path, staff either look colleagues up in a separate app or save numbers individually, and the directory on the phones drifts out of date within weeks.

sync.blue® reads the M365 Global Address List or Google Workspace Directory as a read-only source and fans the entries out to the connected Android devices through its CardDAV mobile storage. The directory refreshes on a schedule, so when a new colleague is added centrally they appear in everyone's phone contacts on the next run, and the admin never has to push records device by device. Employees can call any coworker straight from the android, and caller ID resolves internal numbers automatically.
android company directory sync microsoft 365 gal to android google workspace directory android corporate phone contacts android fleet contact distribution
Use case 03

Load shared contacts when onboarding and remove them when offboarding Android users

When a new employee receives a company Android phone, they should start with the shared team and customer contacts already in place, and when someone leaves, those records should not linger on a returned or wiped device. Doing this manually means an admin populating each new phone by hand and trusting that old numbers get cleaned up later.

sync.blue® treats the central source — a Microsoft 365 tenant, Google Workspace, or the sync.blue® Address Book — as the master and writes the agreed set of contacts to a newly onboarded Android device through the CardDAV mobile endpoint. Because the device's contacts are driven by the sync rather than entered by hand, onboarding a phone is just connecting it to the relationship, and when an Android user is offboarded the admin can stop the sync and clear the previously synced contacts from the target so no outdated numbers remain. Staff get a ready-to-use address book on day one without copy-paste work.
android onboarding contacts android offboarding contact cleanup new employee phone contacts android user lifecycle sync company android contact provisioning
Use case 04

Feed Android contacts into the phone system for caller ID

A field rep saves new prospects and partners directly into their Android phone while out of the office, but the company's cloud PBX or desk phones do not recognise those numbers, so internal calls and shared lines show unidentified callers. The team wants the numbers a rep collects on Android to become usable across the telephony system as well.

sync.blue® reads the rep's Android contacts via Google Contacts or the CardDAV mobile endpoint and writes them onward to the connected telephony platform, such as a cloud PBX or a provisioning target like the sync.blue® LDAP server that soft phones query. The numbers a rep captures on the move are propagated on the next scheduled sync, so incoming calls resolve to the saved name on desk phones and softphones rather than appearing as an unknown number. This keeps the mobile-first workflow intact while still giving the wider phone system accurate caller ID.
android contacts to pbx android caller id sync mobile contacts to phone system android to ldap contacts softphone contact sync
Use case 05

Bridge Android Google contacts with a Microsoft 365 workplace

Employees use personal or work Android phones backed by a Google account, while the organisation runs on Microsoft 365 for email and contacts. Numbers saved on the Android side never reach Outlook, and colleagues added in M365 never show up on the phone, leaving each person to re-enter the same details in two places.

sync.blue® connects the Android-backed Google Contacts to the Microsoft 365 mailbox and keeps the agreed contacts aligned across both, mapping phone numbers, email, company, and addresses between the two systems. A contact saved on the Android device flows into Outlook and the relevant M365 contacts appear on the phone, so each person carries the same address book whichever side they work from. This removes the duplicate data entry that comes from straddling a Google-powered phone and a Microsoft workplace.
android google to microsoft 365 google contacts outlook sync android m365 contact bridge google workspace microsoft contacts cross platform android contact sync
Use case 06

Back up Android contacts to a central store

Contacts that field staff collect on Android phones often exist only on the device, so a lost, reset, or replaced phone takes irreplaceable customer numbers with it. The organisation wants a durable copy of those mobile contacts held somewhere central rather than relying on each handset.

sync.blue® reads the contacts from each Android device through Google Contacts or the CardDAV mobile endpoint and replicates them into a central store such as Microsoft 365, Google Workspace, or the sync.blue® Address Book on a regular schedule. Because the records are copied off the phone automatically, a damaged or replaced device no longer means lost numbers, and a new handset can be repopulated from the same central source. Field staff keep working in their Android contacts while the business retains a maintained copy.
android contact backup backup android address book mobile contact replication android contacts to central store android contact recovery

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Data protection & security – Made in Germany

sync.blue® protects business data to the highest German standards

German provider

ISO 27001 certified data centre

DPA & TOM available

The sync.blue® cloud platform meets the highest demands for data protection, security and transparency. Supported by DataGuard, an independent European provider for data protection and information security. Operations run exclusively in ISO 27001-certified data centres in Germany run by independent providers. sync.blue® additionally offers a legally compliant Data Processing Agreement (DPA) and detailed Technical & Organisational Measures (TOM).

Details on data protection & security
sync.blue® CEO Oliver Baltz

Oliver Baltz
CEO

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FAQ

How does sync.blue® prevent duplicates and resolve conflicts when contacts are edited on Android and in the cloud?
sync.blue® prevents duplicates by recognizing identical contacts when the email address or the combination of first and last name match and updates the existing record instead of creating a new one; if a matched contact has conflicting values between Android and the cloud, the connection’s defined source overwrites the target, so edits from Android (via the sync.blue® app’s local address book and MOBILE Storage) or from the cloud are propagated consistently in one‑way or two‑way sync, with two‑way sync adding or updating on both sides without deleting contacts.
Which Android contact fields are supported and how are they mapped from sources like Microsoft 365, Google Workspace, LDAP, and CSV?
sync.blue® writes to native Android contacts: first name, last name, organization (company, department, position), phone numbers (work, mobile, home, other), work email, postal addresses (work/home: street, house number, ZIP, city, state, country), and birthday; mapping between apps is best‑effort and not user‑configurable; Microsoft 365 and Google Workspace fields (names, company, department, job title, business/mobile/home phones, work email, business/home addresses, birthday) map to the corresponding Android name, organization, typed phones, email, addresses, and birthday; LDAP attributes gn, sn, mail, businessPhone, mobilePhone, homePhone map to Android first name, last name, work email, work, mobile, and home numbers; CSV columns given_name, family_name, company, department, position, phone_work, phone_mobile, phone_home, phone_fax, phone_pager, phone_other, email, birthday map 1:1 to Android name, organization, typed phones, email, and birthday.
What security measures protect Android contact data with sync.blue® (encryption in transit/at rest, access control, GDPR, data residency)?
For the Android integration, sync.blue® documentation states transport is encrypted via HTTPS/TLS, while at‑rest details are not publicly specified, ([help.sync.blue](https://help.sync.blue/hc/en-us/articles/23816000785682-How-secure-is-the-authentication-of-sync-blue-with-external-applications)) access is controlled via personal API keys (CardDAV/Address Book) and OAuth2 tokens for supported apps, ([help.sync.blue](https://help.sync.blue/hc/en-us/articles/6747638856594-How-does-the-sync-blue-Directory-work?utm_source=openai)) GDPR compliance is supported with a downloadable DPA and documented TOM, ([help.sync.blue](https://help.sync.blue/hc/en-us/articles/4411369747730-Where-can-I-download-a-Data-Processing-Agreement-DPA)) and data is processed exclusively in ISO 27001–certified data centers in Germany.
How is 1-way or 2-way contact sync between the sync.blue® cloud and Android configured, and how often can it run on a schedule?
In the sync.blue® dashboard, create a connection that feeds the Android-facing sync.blue® CardDAV/MOBILE address book and set the connector direction to 1-way or 2-way; then deploy the sync.blue® Android app and configure host, username, password and a sync interval via MDM (e.g., Microsoft Intune); scheduling can run at least every 15 minutes on Android (daily/1440 minutes recommended), and the cloud connection can be scheduled manually, hourly, daily, weekly or monthly.
Can IT deploy Android contact sync via MDM/work profile, enforce 1-way vs 2-way per connection, and restrict sync to selected address books or groups?
Yes. sync.blue® supports Android contact sync deployment via Android Enterprise MDM (e.g., Microsoft Intune) with managed app configuration (host, CardDAV user/password, sync interval) and operation in the work profile; the Contacts app in the work profile can be set to the sync.blue® address book. One-way vs two-way is enforced per connection in the sync.blue® dashboard by selecting the direction. Restricting scope is source‑dependent: Microsoft 365 sources allow group selection and custom Graph filters when authorized via App Registration, while general per‑connection contact filtering is not yet available; device‑side selection is limited to choosing the address book shown in the work profile.
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