We have 2 users whose mobile devices keep getting stuck in Quarantined Devices in Office 365 Exchange Online mobile device access. Constant loop of allowing device, hour later we get the "A device that belongs to USER has been quarantined" and then allow again - Loop.
We have 50+ other users allowed OK with no problems but these 2 have just popped up in the last couple of weeks.
By default we Quarantine new devices until we allow - set through normal Exchange ActiveSync Access settings (Not intune or an MDM). Default policy applies.
One user has an iPhone, other an Android. We've got them to try inbuilt mail apps and MS Outlook app for mail but still keeps getting stuck. I've checked but Device ID or details never change when allowed and blocked. Restarting and updating phones etc. Have removed phones completely through portal and got users to re-connect again but still same problem.
Example Quarantine details:
Outlook for iOS and Android
Device user agent:
Device phone number:
Exchange ActiveSync version:
Device policy applied:
Device policies status:
Device access state:
Device access state reason:
Device access control rule:
Any ideas? Feel like i'm missing something simple.