Hello, I have a remote end user that is receiving this error code when trying to sign into any M365 app. Once we close the error message the apps work perfectly fine but this happens daily when signing on and I would like to find a permanent fix. I would attach a screenshot but that doesn't seem to be working right now. User enters login credentials and Microsoft authenticator code then this error pops up for any m365 app / teams / OneDrive. User is in another state so can't come into office. Something went wrong We couldn't sign you in. If this error persists, contact your system administrators and provide the error code CAA90049. Error code: CAA90049 Correlation ID: 9a55***1d07 Server message: Session key is empty Any help is appreciated. Thank you [PII is removed by moderator]

All office 365 Apps affected. Well for us it started with error Error Something went wrong. [1001] Correlation Id: cd2ab264-44cd-4c89-a5fb-c9adb666aecf Timestamp: 2025-06-04T04:13:45.000Z DPTI: 7443ca934062817c03548c0897fa7e94c358d06aa52f56d2f8456bb770b968b6 Error Tag: 58tm1 Error Code: 2147942403 Once we logged out of all office apps and trying to login we get this error CAA90049 , yes once close the box , it works fine however next day it comes back again. FSlogix + O365+ Citrix non persistance VDI, Any one have any solution here?

Correlation Id: b70c4cd5-7017-4c80-8158-14760c2cb34a Timestamp: 2025-07-15T01:33:43.000Z DPTI: ece26c486eb66ff57f398726bc8f06d1a62604f3c58622467bea059bdec38ef8 Message: The credential is invalid. Unexpected sub status (6008). Tag: 657rx Code: 2148073494

Error code CAA90049 - Any M365 App

Anonymous

Hello, I have a remote end user that is receiving this error code when trying to sign into any M365 app. Once we close the error message the apps work perfectly fine but this happens daily when signing on and I would like to find a permanent fix. I would attach a screenshot but that doesn't seem to be working right now.

User enters login credentials and Microsoft authenticator code then this error pops up for any m365 app / teams / OneDrive.
User is in another state so can't come into office.

Something went wrong

We couldn't sign you in. If this error persists, contact your system administrators and provide the error code CAA90049.

Error code: CAA90049

Correlation ID: 9a55***1d07

Server message: Session key is empty

Any help is appreciated.

Thank you

[PII is removed by moderator]

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67 answers

Anonymous

2025-07-03T10:03:00+00:00

All office 365 Apps affected.

Well for us it started with error

Error Something went wrong. [1001]

Correlation Id: cd2ab264-44cd-4c89-a5fb-c9adb666aecf

Timestamp: 2025-06-04T04:13:45.000Z

DPTI: 7443ca934062817c03548c0897fa7e94c358d06aa52f56d2f8456bb770b968b6

Error Tag: 58tm1

Error Code: 2147942403

Once we logged out of all office apps and trying to login we get this error CAA90049 , yes once close the box , it works fine however next day it comes back again. FSlogix + O365+ Citrix non persistance VDI, Any one have any solution here?
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Anonymous

2025-07-15T01:34:20+00:00

Correlation Id: b70c4cd5-7017-4c80-8158-14760c2cb34aTimestamp: 2025-07-15T01:33:43.000ZDPTI: ece26c486eb66ff57f398726bc8f06d1a62604f3c58622467bea059bdec38ef8Message: The credential is invalid. Unexpected sub status (6008).Tag: 657rxCode: 2148073494
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