The common reason for this is that your SQL recovery model for your database has been set to Full. The Full recovery model in SQL allows for point in time restores - however this model requires careful managing by an SQL administrator regarding backups to ensure that datafiles do not grow excessively large as this can cause issues with the stable operation of your database.
Please be aware that Access recommends setting databases to the Simple recovery model.
Access can shrink your datafile for you, be we would recommend that you speak with the people in charge of your SQL server regarding setting the recovery model on the database to Simple rather than Full once the file has been shrunk for you.
Please log a new case online and reference this article.
Shrink the size of the ADM data file
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