Overview
Using Microsoft SQL Server Express Edition with M-Files can lead to severe issues if the database size limit is reached. If no data can be written anymore to the database, the vault may become unusable as no more entries can be written to the event log to allow login. Note that during normal operation the size of the database may temporarily be higher than it is normally so you may hit the limit sooner than you think.The size limits may also be hit if the Microsoft SQL Server Express Edition is used as the reporting database if too much data is contained within the reports.
Limitations for Microsoft SQL Server 2019 can be seen in the following page. Please note that this is a 3rd party site and M-Files is not in control nor is responsible of the contents of the site.
https://docs.microsoft.com/en-us/sql/sql-server/editions-and-components-of-sql-server-version-15?view=sql-server-ver15
