Question: the outlook data file has reached the maximum size office 365?
Answer: The reason behind this error is the file size limitation of Outlook PST file. Actually, the Outlook data file has a certain data limit to store the data items, for example, Outlook 2013, 2016 and 2019 PST file has 50 GB size. And, whenever, PST file has reached the maximum limit, it definitely becomes corrupted.