Exchange 2019 Override Search limit over 250 limits

Question

Exchange 2019 Override Search limit over 250 limits

J Lyons 21

We have numerous lawyers with large mail boxes reaching 100GB, they insist on saving everything in their mailboxes.

using cache mode is limited to 50GB by default and raising it will just eventually max out there computer hard drive.

using the command New-SettingOverride -Name "Increase Search Results Limit" seems a good option.

I have seen a couple of threads to over ride search limit in exchange 2013:

https://social.technet.microsoft.com/Forums/en-US/6daba294-905f-4b33-b696-9d8cb872bcd3/outlook-search-limited-to-250-results?forum=Exch2016SD

and exchange 2016:

https://social.technet.microsoft.com/Forums/en-US/c0925403-e077-49d5-8973-00a3a99c4552/override-search-limit-over-250-limits?forum=Exch2016GD

Does anyone have any experience with this command in an exchange 2019 environment:

Answer 1

Yuki Sun-MSFT 25,151

Hi @J Lyons ,

Based on my test in Exchange 2019 CU12, the command mentioned in the two forum posts can still do the trick.

I run the command below on the Exchange 2019 mailbox server:

New-SettingOverride -Name “Exceed Search Limit over 250” -Component ManagedStore -Section StoreSettings -Reason “Override Search limit over 250 limits” -Parameters @("MaxHitsForFullTextIndexSearches=1000")

Then untick the checkbox of "Improve search speed by limiting the number of results shown" in Outlook > Options > Search. After that, I am able to see more than 250 search results when running in online mode:

You can have go on your end to make change, just do remember to inform users that they need to adjust the setting below within their Outlook applications as well:

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J Lyons 21 Reputation points

2023-01-09T06:28:38.457+00:00

Thanks for your reply, If I understand correctly you are using microsoft 365.

We are using outlook 2016 with the 2019 server.

Should it make a difference?

Does anyone have experience with such an environment?
Yuki Sun-MSFT 25,151 Reputation points

2023-01-09T07:15:20.533+00:00

Hi @J Lyons ,

True, the screenshot I shared above was caught from Outlook for Microsoft 365. But I happen to have Outlook 2016 as well in my lab environment, so I just checked it there. Per my test, it also works in Outlook 2016.

New-SettingOverride command has been run up front as stated earlier. Before changing the setting in Outlook client, it can only show up to 250 research results:

Then I clear the checkbox of "Improve search speed by limiting the number of results shown" and restart Outlook, it can show more than 250 results:
J Lyons 21 Reputation points

2023-01-09T10:46:41.077+00:00

Thank you again for your quick and expert answer.

I have another question, what does this command do at the system level, does it require special indexing to the whole system or it only affects users that have unticked the improve speed option.

In other words does it create a system wide change or is it per user?
Yuki Sun-MSFT 25,151 Reputation points

2023-01-10T01:08:45.073+00:00

Hi @J Lyons ,

"Setting overrides configure and store Exchange server customizations in Active Directory." So, to put it simple, it's a system wide change. But as we can see from the test results, only users that have unticked the improve speed option will be affected by this change.
J Lyons 21 Reputation points

2023-01-10T06:41:27.897+00:00

Ok, thanks.

To make my questions more specific, will this configuration increase use in resources on the server?

If so, in what way are these changes manifested?

What action is performed on the data to allow the search mechanism to return more answers?
Yuki Sun-MSFT 25,151 Reputation points

2023-01-10T07:36:25.72+00:00

Hi @J Lyons ,

Thanks for bring these questions out. I tried searching around but can hardly find publicly available MS documents which can provide more detailed explanation about how this configuration works from the backend.

Regarding your concern, I found an article below which resolves a different issue by creating a setting override. Incomplete search results after installing an Exchange Server 2019 update It's mentioned at the end of the article that "we recommend that you do not leave the override set in the environment permanently because it can cause increased CPU usage.", thus I assume the setting override we discussed earlier in this thread could also lead to increased use in resources on the server. but this won't necessarily occur. Given this, I'd suggest monitoring for some time after making the change in your environement, in case it really causes increased resource usage, you can revert the change by using the Remove-SettingOverride cmdlet.

Exchange 2019 Override Search limit over 250 limits

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