With Exchange 2019, Microsoft has introduced a new search engine: BigFunnel. This is the same engine that is used in Bing and in Exchange Online.
Unfortunately, sometimes, the search results are incomplete. While this might have different reasons, I am just looking at one prticular case here:
Incomplete search results are happening on OWA, i.e. this is an issue on the server, not on Outlook (the client)
The number of missing emails from the search results is visible in "BigFunnelNotIndexedCount"
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Exchange constantly writes DB Logs to disk. These logs only get cleared when a backup is done.
If you need to clear those logs without a backup, use the following commands (if the DB log files are on the d: drive):
Open a cmd box with admin rights
add volume d:
That's it. You should now have much more free disk space.
Somethimes, the default maximum message size (including attachments) is not enough (30 MB is the standard). To increase this to 100 MB, do the following:
First check the current maximum size on all relevant Exchange components:
Get-TransportConfig | ft MaxSendSize, MaxReceiveSize
Get-ReceiveConnector | ft Name, MaxmessageSize
Get-SendConnector | ft Name, MaxMessageSize
Get-Mailbox Administrator |ft Name, MaxsendSize, MaxReceiveSize
Then set it to 100 MB for all components:
Set-TransportConfig Read more [...]