Invalid username or password, please try again later

%3CLINGO-SUB%20id%3D%22lingo-sub-2347786%22%20slang%3D%22en-US%22%3EInvalid%20username%20or%20password%2C%20please%20try%20again%20later%3C%2FLINGO-SUB%3E%3CLINGO-BODY%20id%3D%22lingo-body-2347786%22%20slang%3D%22en-US%22%3E%3CP%3EHi%2C%3C%2FP%3E%3CP%3EWe%20have%20a%20problem%20that%20we%20can%E2%80%99t%20log%20in%20to%20OWA%20and%20the%20mobile%20app%20a%20few%20times%20a%20day%2C%20but%20the%20error%20always%20goes%20away%20after%20a%20few%20minutes.%20We%20have%20Exchange%202019%20CU7%20and%20Windows%20Server%202019%20servers.%3CBR%20%2F%3EYou%20receive%20the%20following%20error%20message%3A%3CBR%20%2F%3EInvalid%20username%20or%20password%2C%20please%20try%20again%20later%3C%2FP%3E%3CP%3EDuring%20this%20time%2C%20the%20installed%20outlook%20works%20fine.%3CBR%20%2F%3EThe%20error%20started%20about%201%20month%20ago.%3CBR%20%2F%3EMy%20question%20would%20be%2C%20where%20could%20the%20error%20be%3F%20In%20which%20log%20should%20we%20search%3F%3CBR%20%2F%3E(IIS%20log%2C%20AD%20log%2C%3F%20Log)%3C%2FP%3E%3C%2FLINGO-BODY%3E%3CLINGO-LABS%20id%3D%22lingo-labs-2347786%22%20slang%3D%22en-US%22%3E%3CLINGO-LABEL%3EExchange%20Server%3C%2FLINGO-LABEL%3E%3C%2FLINGO-LABS%3E%3CLINGO-SUB%20id%3D%22lingo-sub-2348369%22%20slang%3D%22en-US%22%3ERe%3A%20Invalid%20username%20or%20password%2C%20please%20try%20again%20later%3C%2FLINGO-SUB%3E%3CLINGO-BODY%20id%3D%22lingo-body-2348369%22%20slang%3D%22en-US%22%3E%3CP%3EHi%20%3CA%20href%3D%22https%3A%2F%2Ftechcommunity.microsoft.com%2Ft5%2Fuser%2Fviewprofilepage%2Fuser-id%2F570036%22%20target%3D%22_blank%22%3E%40Icsab%3C%2FA%3E%20%2C%3CBR%20%2F%3EI%20can't%20help%20you%2C%20but%20I%20want%20to%20inform%20you%2C%20that%20you%20should%20%3CSTRONG%3EUpdate%20your%20Exchange%20ASAP%20to%20CU%209!%3C%2FSTRONG%3E%3C%2FP%3E%3CP%3EI%20recommend%20the%20links%20listed%20down%20below.%3C%2FP%3E%3CP%3EBest%20regards%3C%2FP%3E%3CP%3ESchnittlauch%3C%2FP%3E%3CP%3E%26nbsp%3B%3C%2FP%3E%3CP%3E%3CA%20href%3D%22https%3A%2F%2Ftechcommunity.microsoft.com%2Ft5%2Fexchange-team-blog%2Freleased-april-2021-exchange-server-security-updates%2Fba-p%2F2254617%22%20target%3D%22_blank%22%3Ehttps%3A%2F%2Ftechcommunity.microsoft.com%2Ft5%2Fexchange-team-blog%2Freleased-april-2021-exchange-server-security-updates%2Fba-p%2F2254617%3C%2FA%3E%3C%2FP%3E%3CP%3E%3CA%20href%3D%22https%3A%2F%2Fexupdatestepbystep.azurewebsites.net%2F%22%20target%3D%22_blank%22%20rel%3D%22noopener%20noreferrer%22%3Ehttps%3A%2F%2Fexupdatestepbystep.azurewebsites.net%2F%3C%2FA%3E%3C%2FP%3E%3CP%3E%3CA%20href%3D%22https%3A%2F%2Fblog.qualys.com%2Fvulnerabilities-research%2F2021%2F03%2F03%2Fmicrosoft-exchange-server-zero-days-automatically-discover-prioritize-and-remediate-using-qualys-vmdr%22%20target%3D%22_blank%22%20rel%3D%22nofollow%20noopener%20noreferrer%22%3Ehttps%3A%2F%2Fblog.qualys.com%2Fvulnerabilities-research%2F2021%2F03%2F03%2Fmicrosoft-exchange-server-zero-days-automatically-discover-prioritize-and-remediate-using-qualys-vmdr%3C%2FA%3E%3C%2FP%3E%3CP%3E%26nbsp%3B%3C%2FP%3E%3C%2FLINGO-BODY%3E
Occasional Contributor

Hi,

We have a problem that we can’t log in to OWA and the mobile app a few times a day, but the error always goes away after a few minutes. We have Exchange 2019 CU7 and Windows Server 2019 servers.
You receive the following error message:
Invalid username or password, please try again later

During this time, the installed outlook works fine.
The error started about 1 month ago.
My question would be, where could the error be? In which log should we search?
(IIS log, AD log,? Log)

1 Reply