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
    2023-09-21T07:38:03+00:00

    Hi everyone,

    Does anyone have more information on this 1001 issue?

    In the meantime, we have found another temporary fix so that you don't have to delete the entire user profile (saves a lot of work).

    1. Mount the VHDX file under Windows server and assign it a drive letter.
    2. Delete the following folders within the user profile: Under Local: Microsoft, Packages, and OneDrive Under Roaming: Microsoft
    3. Unmount and start the profile (login with user).
    4. Start Outlook and enter your passwords.
    5. Then you're good to go, and all other settings in the profile will be preserved.

    Please note that these folders cannot be deleted while the user profile is in use/when the user is logged in.

    Regards.

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  2. Anonymous
    2023-09-19T16:24:31+00:00

    Hello,

    We use regular user profile disks and we also encounter this problem.

    About 50 RDS users - WS2019 std

    Randomly impacted users. Even on a newly created session

    No workaround, exepted the creation of a new RDS session profile

    Only customer impacted for us.

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  3. Anonymous
    2023-09-19T13:26:25+00:00

    We've been having this same issue for several months. FSLogix, Server 2019, Office 365.

    In an environment of 70 users across 3 host servers, it was initally occuring for maybe 1 user per week.

    Within the last month it started occuring with 1 user every day or two.

    Within the last week I'm getting 10 users per day reporting this issue.

    The ONLY fix that has worked for us is to delete and completely rebuild the FSLogix profile. Sometimes this helps for awhile; sometimes it only helps for a day or two and the problem is back.

    I've currently decommisioned Outlook in the RDS environment and directed users to use OWA in their browser. Obviously there's some grumbling over this, so I really hope there's a fix soon.

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  4. Anonymous
    2023-09-19T11:46:12+00:00

    Add another +1 for this exact issue

    Server 2019 - 4x RDS Session Hosts

    FSLogix

    Everything that has already been said in these comments. No concrete, long-term fix found. Unhappy clients when we regularly have to bounce them around RDSH until one will connect but maybe for a day or two. Re-doing the FSLogix disk seems to last longer.

    In a company of 65 we've maybe had thisa dozen times this year.

    Sometimes it manifests itself in only "Need Password" in Outlook with no prompt but our temporary fix has been the same - New FSLogix disk

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  5. Anonymous
    2023-09-19T10:23:59+00:00

    Interesting to know that this isn't a fslogix only problem but rather a terminal server / M365 problem. Let's indeed hope they finally start fixing things instead of focussing on introducing new features...

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