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How do I prevent Microsoft Outlook contacts from merging with iCloud contacts?

How can I stop Microsoft outlook contacts showing/merging into my icloud contacts? I delete them and then they come back. Very frustrating and time wasting to have them just re-appear again after I've deleted them.



[Re-Titled by Moderator]

Original Title: iCoud and Microsoft contacts

iPhone 13 Pro, iOS 26

Posted on Jan 2, 2026 5:12 PM

Question marked as Top-ranking reply

Posted on Jan 3, 2026 6:45 AM

To ensure that Outlook for iOS has no ability to interact with other contacts on the phone:

Settings > Apps > Outlook > Contacts > None


If you have your Microsoft email account configured to display in Contacts, disable that:

Settings > Apps > Contacts > Contacts Accounts > touch your Microsoft account > Disable Contacts


Then, clean up any contacts that you don't want and they should not re-appear.

1 reply
Question marked as Top-ranking reply

Jan 3, 2026 6:45 AM in response to PLP48

To ensure that Outlook for iOS has no ability to interact with other contacts on the phone:

Settings > Apps > Outlook > Contacts > None


If you have your Microsoft email account configured to display in Contacts, disable that:

Settings > Apps > Contacts > Contacts Accounts > touch your Microsoft account > Disable Contacts


Then, clean up any contacts that you don't want and they should not re-appear.

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How do I prevent Microsoft Outlook contacts from merging with iCloud contacts?

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