Outlook 365 app error 1001 on RDS environment ( FSLogix)

Anonymous

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

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278 answers

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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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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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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Anonymous

2023-09-21T09:21:10+00:00

Just to add ours to this but we have the same issue....always random people however we find simply bouncing them onto another server fixes the issue (albeit temporarily) so I would agree that it's some sort of authentication issue however I tested the same environment using a Volume Licence install of office (instead of the click to run) and have had no issues in testing however we don't have a paid for Volume Licence to continue using this version but having worked at MSP's for 20 years I've found a lot of these types of issues (including one's we've had recently whereby it shows random users as not licenced when they are) is down to the Office click to run program and Microsoft have never fixed it so we've always put the Volume Licence copy of office on customers servers and never get these types of issues but I work for internal I.T now so we don't have a licence to use full time.

Unfortunately (like I suspect a lot of you) we can't keep a user "not working for a day or two" while we do some background digging on it as our staff need to be able to work so although bouncing them fixes the issue when then in fact remove all evidence of the issue for troubleshooting.
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Anonymous

2023-09-25T09:23:30+00:00

Today we had an explosion of 1001 error's and password entries.

What nonsense! Anyone else had this too?

It's driving us nuts!
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