On 5.2609.1 it looks like tapping the toggle when "off" doesn't result in it appearing "on", but does accomplish a (partial?) one-time sync.
Android outlook app won't allow toggle to sync to native calendar
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ekulik1
245
Reputation points
Hello, I encountered a problem March 12, 2026 where the Outlook app for Android won't allow me to sync my calendar to my native Android calendar using the sync calendars toggle under Outlook settings. The toggle isn't greyed out, it just won't allow me to click it.
I've ensured the app has all the access permissions it needs, reset the account, emptied the cache, restarted the phone, and uninstalled and reinstalled the Outlook app, but none of these solutions worked.
Are there any other ways to troubleshoot this issue? Thank you for your help!
Outlook | Outlook for mobile | Outlook for Android | For business
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David Elsner 20 Reputation points2026-03-18T14:51:07.5466667+00:00 Same issue here with all my 365 accounts. I am not able to toggle the switches. Google Calendar is no longer syncing.
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Abbe Dijkstra 25 Reputation points2026-03-19T10:31:05.98+00:00 Same issue here, and need it desperately for work. Please fix this ASAP, as many users rely on it.
Thanks, Abbe
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Joe Tishkoff 0 Reputation points2026-03-22T02:45:35.6866667+00:00 This resolved the issue of the grayed out toggle. Great news s
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6 answers
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Gregory McDaniel 30 Reputation points2026-03-18T13:15:29.28+00:00 -
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Robby P 0 Reputation points2026-03-21T12:24:52.9233333+00:00 Major issue for us that depend on work calendars.
I can toggle my contacts but I cannot toggle my calendar
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Kev P 25 Reputation points2026-03-22T02:02:22.62+00:00 Latest version came today. 5.2610.1. This is working. All calendars are syncing again.
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Abbe Dijkstra 25 Reputation points
2026-03-22T02:05:56.7566667+00:00 Yes, I can confirm todays update 5.2620.1 fixes it. It did take a restart of my phone, but now it works. Thank you programmers!
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LeonardoAr 0 Reputation points2026-03-31T19:12:07.1233333+00:00 None has seen this update on playstore in Italy where the bug is still present, where is it possibimle to download this new release?
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Kev P 25 Reputation points
2026-03-31T19:30:09.9633333+00:00 apkmirror has it if you want to sideload.
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Hornblower409 7,555 Reputation points2026-03-31T20:35:44.45+00:00 @LeonardoAr said
None has seen this update on playstore in Italy where the bug is still present
Do you mean 5.2610.1 and/or 5.2620.1 ?
The reports I have seen are that any Build => 5.2610.1 fix the bug.
5.2610.1 went into General Release March 20, 2026
https://learn.microsoft.com/en-us/officeupdates/release-notes-outlook-mobileAnd a higher release is available on the US PlayStore
If you can't get any Build => 5.2610.1 I would suggest you put your question to Microsoft using in-App Support
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LeonardoAr 0 Reputation points
2026-03-31T21:19:46.9733333+00:00 There is not 5.2620.1 on the italian playstore. And until that you can't sync your phonebook that is an unacceptable bug
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Michael Greenberg 10 Reputation points2026-04-01T06:30:23.3333333+00:00 I have just reverted to Android Outlook Version 5.2548.3 and it now works ok
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Battsman 15 Reputation points2026-03-19T16:46:22.26+00:00 Same issue. Outlook/Android calendar no longer syncing and cannot toggle Calendar Sync back on in the Outlook Android app settings.
Numerous Redit reporting this issue over the past few days with only identified solution (to date) of rolling back to a previous build of Outlook by downloading an APK. If a previous build fixes it, this is pretty much guaranteed that Microsoft changed something in the app and clearing cache, reloading Outlook, etc. won't fix it... (Redit users also saying those steps don't help.)
https://www.reddit.com/r/Outlook/comments/1rrydx0/android_app_unable_to_toggle_calendar_sync/ -
Michael Greenberg 10 Reputation points
2026-03-20T11:04:41.1166667+00:00 I have just reverted to Android Outlook Version 5.2548.3 and it now works ok
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DanielT 5 Reputation points2026-03-21T05:01:20.1033333+00:00 same for me. Problem noticed about 1 weerk ago and after spending hours trying to fix it, I reverted to Android outlook 5.2548.3 and that fixed the problem. I have now deactivated automatic update for outlook until this gets solved.
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