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]

Setting RoamIdentity to "Enable" does NOT resolve the issue for us.

Not that I'm aware of. Using Win10 Enterprise pool but can check to see if that's an option I can disable on the pool creation. Note: we currently have a production pool in use where O365 and Classic Teams and older version of FSLogix (not HF4) being used, no issues. Just on this new test pool. I will check that GPO. Thank you, Craig!

JQueen.24 - Are you using a vTPM? My golden image never had a vTPM and when I created a new pool and told horizon NOT to add the vTPM my issue went away. As such that became my fix. Additionally on the 31st PhRust posted this and it seems to have helped others. We had the same problem after an upgrade to Server 2022 with FSLogix HF4 (2.9.8884.27471), after we set the "RoamIdentity" to "1" via GPO it works fine. https://learn.microsoft.com/en-Us/fslogix/reference-configuration-settings?tabs=profiles#roamidentity

I'm also seeing this in Horizon 8, instant clone desktop VDI using FSLogix HF4 for profile management. We are trying to get the New Teams and New Outlook working on Win10 Enterprise desktops. We use Okta 2fa and on a new profile we can get setup in all the apps New Teams, New Outlook, OneDrive, Edge, etc... However, once we logoff the session and get a new session, this is when we start to see the error as reported.

I have tested this fix and it does appear to resolve the issue.

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]

Locked Question. This question was migrated from the Microsoft Support Community. You can vote on whether it's helpful, but you can't add comments or replies or follow the question.

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67 answers

Anonymous

2024-08-15T20:13:31+00:00

Setting RoamIdentity to "Enable" does NOT resolve the issue for us.
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Anonymous

2024-08-09T14:54:59+00:00

Not that I'm aware of. Using Win10 Enterprise pool but can check to see if that's an option I can disable on the pool creation.

Note: we currently have a production pool in use where O365 and Classic Teams and older version of FSLogix (not HF4) being used, no issues. Just on this new test pool. I will check that GPO. Thank you, Craig!
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Anonymous

2024-08-09T14:30:51+00:00

JQueen.24 - Are you using a vTPM? My golden image never had a vTPM and when I created a new pool and told horizon NOT to add the vTPM my issue went away. As such that became my fix.

Additionally on the 31st PhRust posted this and it seems to have helped others.

We had the same problem after an upgrade to Server 2022 with FSLogix HF4 (2.9.8884.27471), after we set the "RoamIdentity" to "1" via GPO it works fine.

https://learn.microsoft.com/en-Us/fslogix/reference-configuration-settings?tabs=profiles#roamidentity
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Anonymous

2024-08-09T14:21:20+00:00

I'm also seeing this in Horizon 8, instant clone desktop VDI using FSLogix HF4 for profile management. We are trying to get the New Teams and New Outlook working on Win10 Enterprise desktops. We use Okta 2fa and on a new profile we can get setup in all the apps New Teams, New Outlook, OneDrive, Edge, etc... However, once we logoff the session and get a new session, this is when we start to see the error as reported.
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Anonymous

2024-08-06T11:07:19+00:00

I have tested this fix and it does appear to resolve the issue.
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