Outlook calendar and contacts not syncing anymore with Calendar and contacts on my Android phone

PauleBollen-9983 0 Reputation points
2026-11-08T16:12:03.6666667+00:00

I use Outlook classic version on my Windows 11 PC. I use Gmail in my outlook for emails, Outlook People for my contacts and Outlook calendar.

On my Galaxy S20 FE I use Gmail app for my emails, the Calendar app and the contacts app that were syncing with my outlook account. Yesterday syncing my Contacts app on my phone has synced with Google contacts and calendar (almost empty because I don't use them).

When I go to manage accounts on my phone, I cannot sync my outlook at all. The sync button is unresponsive. The outlook account is not even an option in calendar. Only the Samsung and Google accounts are.

I have cleared data and cache, removed and re-installed the outlook app, re-started my phone several times, without result.

This had already happened in the past, and was resolved by using the outlook app, but not now. Please help!

Outlook | Windows | Classic Outlook for Windows | For home
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  1. Vikki-T 13,600 Reputation points Microsoft External Staff Moderator
    2026-11-09T08:47:42.6366667+00:00

    Hi PauleBollen-9983,

    It sounds as though the issue is no longer limited to the Outlook app. The Microsoft account may have been removed as an Android sync source, which would explain why only the Samsung and Google accounts now appear in the phone’s Calendar and Contacts apps.

    Since you have already cleared the app data, reinstalled Outlook, and restarted the phone, please check Settings > Accounts and backup > Manage accounts on the Samsung phone. If the affected Microsoft account is no longer listed there, add it again using Exchange, Microsoft Exchange ActiveSync, or Outlook.com, depending on the choices shown. Avoid adding it as IMAP or POP, because those account types synchronize email only, not calendars or contacts.

    If the account is still listed, open it and check whether Calendar and Contacts synchronization can be enabled. Also confirm that Outlook has Contacts permission under Settings > Apps > Outlook > Permissions, then open Outlook and check Settings > your account > Sync Contacts.

    One detail would help narrow this down: is the missing account an Outlook.com/Hotmail account, a Microsoft 365 work or school account, or the Gmail account that you use in Outlook classic? Also, when you sign in to the account on the web, can you still see the expected calendar and contacts there?

    Microsoft’s official guidance for mobile calendar and contact synchronization is available here: Can’t sync calendar and contacts with my phone or tablet. Thank you so much for your understanding.   

    Note: Please follow the steps in our documentation to enable e-mail notifications if you want to receive the related email notification for this thread.

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  2. AI answer

    2026-11-08T16:12:21.9966667+00:00

    The current setup is the root cause: Gmail added to Outlook is typically an IMAP account, and IMAP/POP do not sync calendar or contacts. They sync email only. That is why Outlook classic on Windows can show Gmail email, but the Android Calendar and Contacts apps cannot reliably sync Outlook calendar/people data from that Gmail account.

    For the Android side, use this path:

    1. In Outlook for Android, open Settings > Accounts > select the affected account.
    2. Check the account type shown at the top.
      • If it is IMAP or POP, calendar and contacts sync is not supported for that account.
    3. If it is not IMAP/POP, tap Reset Account.
    4. If reset does not help, go to Settings > select the account > Delete Account > Delete From This Device, then add it again.
    5. In Outlook for Android, go to Settings > Contacts > Sync Contacts and turn on sync for the accounts that should export contacts to the phone.
    6. On Android, go to Settings > Apps > Outlook > Permissions and make sure access to Contacts and accounts is allowed.
    7. In Outlook for Android, go to Calendar, tap the calendar icon or avatar in the upper-left, and make sure the correct calendar is selected with a checkmark.

    Important limitation for the built-in Samsung/Android apps:

    • If the account is added as IMAP, the phone’s Calendar and Contacts apps will not sync calendar/contacts from it.
    • In Samsung Email, if an account is IMAP, it must be removed and re-added as Exchange or Outlook.com for calendar/contact sync to be available.

    Based on the described setup, the supported options are:

    • Use Outlook for Android for email, calendar, and contacts management.
    • If calendar/contacts must sync to the phone’s native apps, use an account type that supports Exchange ActiveSync rather than IMAP/POP.
    • If the mailbox provider only offers IMAP/POP for that account, calendar and contacts sync will not work through Outlook for that account.

    If this used to work with the phone’s native Calendar and Contacts apps and now only Google/Samsung accounts appear, that indicates the Outlook account is no longer exposed to Android as a sync source. The documented self-service checks are the Outlook app permissions, Sync Contacts, calendar selection, Reset Account, and re-adding the account. If the account remains IMAP, there is no supported way to make calendar and contacts sync through that account.

    For a work or school Microsoft 365/Exchange account, contact the Microsoft 365 admin or technical support. For Outlook app or Outlook.com account issues, use Microsoft support or the Contact Support option in Outlook mobile.

    References:

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