Outlook 365 app error 1001 on RDS environment ( FSLogix)

Anonymous
2023-07-07T08:25:49+00:00

Hello,

We encounter an issue with M365 apps (Outlook, Work, Excel) on a specific environment ( Remote Desktop Service)

Sometime, when an user open his application (Outlook for instance) on a RDS, an authentification pop and ask for credentials. If the user enter his credentials, he encounter a 1001 error.

« We encountered an issue [1001] »

https://learn-attachment.microsoft.com/api/attachments/5a947921-955a-4688-ad93-acc305bf77c6?platform=QnA

We already try some step to resolve the issue that help in some case but not all the case, and not defintely for a same user ( Issue occur again) :

  • Clear folder C:\Users*yourusername*\AppData\Local\Microsoft\OneAuth and  C:\Users*yourusername*\AppData\Local\Microsoft\IdentityCache
  • Move the user from 1 TSE server to an other TSE)e
  • Clear FSlogix User profil ( The specific one link to FSLogix Office 365 Container technology )

The main issue is that the error can occur again few day laterfor the same user.

We also generate some log from M365 apps client during the signin process with this link to help : https://learn.microsoft.com/en-us/office/troubleshoot/diagnostic-logs/how-to-enable-office-365-proplus-uls-logging

In the log I find the reference to the 1001 error but the log is a bit complex to understand or analyse.

0xa3e4	Microsoft Outlook	Identity Authentication Client	48cmb	Monitorable	OneAuth log {"Message": "[MSAL:0004]\tERROR  \tErrorInternalImpl:134\tCreated an error: 58tm1, StatusInternal::Unexpected, InternalEvent::None, Error Code 2147942403, Context '(pii)'", "IsError": true}	

07/07/2023 09:04:21.440	OUTLOOK (0x8b30)	0xa3e4	Microsoft Outlook	Identity Authentication Client	48cmb	Monitorable	OneAuth log {"Message": "[OneAuth:Error:58tm1:db6d7d6e-a557-4465-a968-a874c5e456e5] (Code:1001) An unexpected error occurred.", "IsError": true}	

07/07/2023 09:04:21.440	OUTLOOK (0x8b30)	0xa3e4	Microsoft Outlook	Identity Authentication Client	48cmb	Monitorable	OneAuth log {"Message": "[OneAuth:Error:9vdpp:db6d7d6e-a557-4465-a968-a874c5e456e5] Unexpected error code: 1001", "IsError": true}

Environment :

  • Microsoft FSLogix version : 2.9.7654.46150
  • Office version : version 2305 build 16501.20228
  • OS version : Windows Server 2019 Standard 1809 build 17763.4499
Outlook | Windows | Classic Outlook for Windows | For home

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  1. Anonymous
    2023-09-28T09:13:38+00:00

    Not sure if this will confuse things and whether it's relevant (or just an unrelated issue) but we've had a laptop with Office 365 installed to it (so nothing to do with RDS or FSLOGIX) and that has also had the 1001 error for a few days when opening Outlook but I've uninstalled and reinstalled Office and removed their Outlook profile data and it's still been showing the 1001 error even if I try to add a different users email account however I've just done a search in the registry for anything that has their email address in and removed anything that looks like it's linked to Outlook or anything that has licence in the title (there was one called licencetoemail) and removed all of these (no reboot) and this has worked.

    Unfortunately I didn't make a note of the reg keys and so this won't help but thought I'd mention it in case anyone else gets major issues that they can't resolve with the usual fixes given here but I'd be interested to hear if anyone else has this issue on a non RDS/FSLOGIX system as well ?

    We've only had this one issue outside of RDS and (fingers crossed) we've had no Outlook issues on RDS for the past 2 days but I've found that Office has updated to 16.0.16731.20234.

    The only changes I've made (yesterday) were to enable the Roam Identity to enabled and changed the temp files to push to a local drive as opposed to the FSLOGIC container

    Thanks

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  2. Anonymous
    2023-09-28T12:34:08+00:00

    Same issue here. Hope a definite fix will come up on the next days.

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  3. Anonymous
    2023-09-29T05:47:25+00:00

    We've been experiencing the same issue for more than two months.

    It is unacceptable that Microsoft still hasn't found a solution to fix this.

    Affected environment:

    2 RDS Session Hosts running Windows Server 2019

    FSLogix Version 2.9.8228.50276

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  4. Anonymous
    2023-09-29T07:14:14+00:00

    We have other tools to maintain high security, but with a downgrade you always have some (temporary) risk. But a workable situation is also very important.

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  5. Anonymous
    2023-09-29T07:16:37+00:00

    Today is day 2 without 1001 errors!
    So far everything is going well and no Outlook problems!
    So it seems the downgrade and ADAL as stable authentication method helped.

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