Outlook stars very slowly

Stefan Falk 271

Hello everybody, at a customer's site, there is Outlook 2019 running both on 2019 terminal servers and on workstations/notebooks, talking to an Exchange 2016 server. Outlook starts very slowly there, takes one to two minutes to come up. How can we diagnose that please? Best Regards, Stefan Falk

17 answers

Ashok M 6,846 Reputation points

2021-02-07T13:17:31.49+00:00

Hi,

Is this happening to one user or multiple users?

Please check the below,

1.Launch outlook in safe mode to check if the issue is with add-ins (If safe mode works, try disabling add-ins one by one to narrow down to the problematic one)
2.If mailbox size is huge and if outlook is configured in online mode
3.Multiple shared mailboxes are configured or added to the profile

https://support.microsoft.com/en-us/topic/how-to-troubleshoot-performance-issues-in-outlook-7ac5402d-c4eb-ed6b-9545-b26dde618755
https://www.webnots.com/fix-microsoft-outlook-slow-loading-issue/

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Stefan Falk 271 Reputation points

2021-02-07T13:19:38.48+00:00

Hello AshokM,

Thanks for your input. I'll check with the customer next week and return here.

Ashok M 6,846 Reputation points

2021-02-07T13:43:31.57+00:00

Sure, thanks for the update.

JeffYang-MSFT 6,261 Reputation points Moderator

2021-02-08T08:32:07.26+00:00

Hi @Stefan Falk ,
Agree with what AshokM's detailed answer above. Please check these factors from the customer's side and see if this issue could be resolved.
Any update, please feel free to post back and share with us.
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Stefan Falk 271 Reputation points

2021-02-09T09:19:56.283+00:00

Hello everybody,

we have got answers:

a) outlook /safe did not help. Starting outlook takes 55 - 60 seconds in safe mode also.

b) Outlook is in online mode, as we run terminal servers. But the effect is there for all users, including ones with very small mailboxes.

c) The effect is also present for users without access to foreign mailboxes.

And I can add: Recreating the MAPI profile does not help.

What can I check now please?
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Ashok M 6,846 Reputation points

2021-02-10T08:33:19.37+00:00

Hi @Stefan Falk ,

Apologize for the delay.

What is the version of the outlook?
Is it up-to-date with the latest updates/security patches?
Do you have any Anti-virus? If so, try disabling it and check

Stefan Falk 271 Reputation points

2021-02-10T09:06:29.653+00:00

Hello AshokM,

the customer is running Office 2019, fully patched by WSUS. There is G DATA Antivirus running on terminal servers and workstations. I'll have the customer do a test without Antivirus and return here.

Ashok M 6,846 Reputation points

2021-02-16T06:24:16.013+00:00

Hi @Stefan Falk ,

Any updates on this? Were you able to test the outlook behavior by disabling the Antivirus?

Stefan Falk 271 Reputation points

2021-02-16T08:55:05.457+00:00

Hello AshokM,

I could not get to the customer yet, unfortunately, but I think I can test this week and definitely will return here, please be assurred.
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JeffYang-MSFT 6,261 Reputation points Moderator

2021-02-11T01:58:00.22+00:00

Hi @Stefan Falk ,

During the "55 - 60" seconds, have you noticed that Outlook stuck at which specific step for a long time?

I noticed that you have mentioned that this issue happened to all the users even those who only have small mailboxes. So, we may can infer that Outlook client is not the key of this issue. There seems to be some common factors among all these users and caused this issue. Antivirus software and other third-party programs have influence on Outlook, please try to perform a clean boot in Windows and only run Outlook client alone to see if the issue has any difference.

By the way, for online mode, Outlook will directly access data from your mailserver. So, it is also suggested to check if there is any restriction in your network settings or mail server.

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Stefan Falk 271 Reputation points

2021-02-11T12:29:49.42+00:00

Hello Jeff,

Outlook pauses long with "Profil wird geladen." (Loading Profile) in it's splash screen.

Regarding tests with clean boot: The problems came up when we migrated to Exchange 2016. Earlier, Outlook 2010 and Exchange 2010 were used, and Outlook started quickly. So I guess it has nothing to do with some operating sytem problems but with some thing - may well be a configuration problem - with Exchange 2016 (or Outlook 2019).

JeffYang-MSFT 6,261 Reputation points Moderator

2021-02-12T06:22:16.577+00:00

Hi @Stefan Falk ,

Thanks for your reply.

Since you have mentioned that the issue only happens after migration, have you already completely migrated all the data from the old Exchange server to the new one? As I know, issues like this might happen if part of your data is still stored on the old Exchange server and Exchange 2010 mail server not support Outlook 2019 desktop client.

By the way, to check if there is something wrong with your Autodiscove between your Outlook client and mailsever, please try the Microsoft Remote Connectivity Analyzer tool to test your email account and see if there is any errors in the results.

Stefan Falk 271 Reputation points

2021-02-12T09:05:41.63+00:00

Hello Jeff,

yes, the migration was completed months ago. There is no older Exchange server any more. I'll re-try the analyzer and report here.

Jade Liang-MSFT 9,986 Reputation points Microsoft Employee

2021-02-16T09:44:37.663+00:00

Just checking if your issue has any update now, if so, please feel free to post back :)
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Stefan Falk 271 Reputation points

2021-02-16T11:12:28.183+00:00

Hello, I have news.

The "Outlook" test in https://testconnectivity.microsoft.com/tests/exchange ends with the following error:

Es wird versucht, ein Ping-Signal an den Endpunkt "MAPI-E-Mail-Speicher" mit der Identität "******@caritas-speyer.de:6001" zu senden.
Fehler beim Versuch, ein PING-Signal an den Endpunkt zu senden.
Weitere Details
Vom RPC-Laufzeitprozess wurde ein RPC-Fehler ausgelöst. Fehler 1818 CallCancelled.
RPC-Status: 1818 CallCancelled
Zeitstempel: 2/16/2021 11:02:17 AM
Generierende Komponente: 14 (WinHttp)
Status: 1818
Ort der Ermittlung: 1390 (HTTP2ClientVirtualConnection__ClientOpenInternal10)
0Flags:
-Parameter:
30000

If I shall translate anything thereof, please let me know.

Get-OutlookAnywhere refers to the FQDN of the internet-side name both for its external and its internal URI. However, internally we have split-DNS, and the external name resolves directly to the internal IP of the Exchange 2016 VM. So, what the connectivity analyzer sees from the outside is not necessarily that what Outlook sees on the internal LAN. Please consider that. If I can test anything else, please let me know. Thank you all!

Best Regards,
Stefan
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JeffYang-MSFT 6,261 Reputation points Moderator

2021-02-19T09:53:48.487+00:00

Hi @Stefan Falk ,

Thanks for your update here.

To better understand your test result, would you mind re-running the same test in English language and providing us with the screenshots of your test result? (Notice: Please hide your personal information in the screenshot for security.)

By the way, I found a similar thread about your issue, you can also try the other workarounds mentioned in the thread outlook 2019 takes long time to open and see if the issue has any difference.

JeffYang-MSFT 6,261 Reputation points Moderator

2021-02-26T09:25:34.673+00:00

Hi @Stefan Falk ,
It has been a while, how is everything going?
If you have any update about this issue, please feel free to post back.
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Stefan Falk 171 Reputation points

2021-02-26T10:10:31.167+00:00

Hello Jeff,

Ups - I thought I had answered already - sorry!

I tried to rung the analyzer in English language. I can open it, select the "gear" symbol, choose German language and click Save. But nothing happens. The language "dialog" stays open, and the languange stays German. I tried that both from a machine of the customer as well as from my own workstion.

How can I configure the language if using the UI of the website does not work?
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JeffYang-MSFT 6,261 Reputation points Moderator

2021-03-01T07:46:23.403+00:00

Hi StefanFalk-3673,
Thanks for your reply.
I did some tests and found that changing the default language of your browser should be able to help here. Please try and see if it could work on your side.
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Outlook stars very slowly

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