Symptoms
When trying to login using SAML, following error is observed:
Logon using SAML failed. Error: Cannot create a file when that file already exists.
Following event can be observed in the Security.evtx on Connection Broker:
Event ID: 4625
Status: 0xC0000006D
Sub Status: 0xC00000064
Task Category: Logon
Keywords: Audit Failure
Cause
CB is not a member of "Administrators" AD group.
Resolution
Add computer account of all connection broker machines into "Administrators" AD group.
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