IOS outlook apps can't sign in O365 suddently

[Deleted]

IOS apps cache O365 Auth, we delete all MS relate apps on IOS and delete Outlook app.

But when we open Outlook apps it still appear a O365 profile and then auth failed.

Any idea to clean up O365 cache auth on Outlook Apps, or any apps with link to Outlook App.

Thanks.

[#2 · Accepted solution]

Hi John,

It can take up to 3-7 days after deleting the Outlook for iOS app on your mobile devices to clear the cache completely.

TechNet describes the following three options:

• Option 1: Initiate a Remote Wipe for each user who has used the Outlook app for iOS and Android to connect to Office 365 or Exchange.

• Option 2: Have all users delete the Outlook app. All data will be removed in approximately 3-7 days.

• Option 3: Have each user remove their account from the Outlook app, and then delete the app from their mobile devices. To remove an account, have users follow these steps:

  1. In the Outlook app, in Settings, tap Account Settings.

  2. Tap Select an Account, and then, with the account selected, tap Remove Account.

  3. Tap Device & Remote Data.

https://technet.microsoft.com/en-us/library/mt684948(v=exchg.160).aspx

- Dominik