This video will show how you can increase OST file size in Outlook365. By default, the OST file size can grow as large as 50 GB in office 365, but around 47.5 GB, the Outlook will stop working. The
Tag: OST
By default pst-file or ost-file size can grow as large as 20GB in Outlook 2007 & 50 GB in Outlook 2010, 2013, 2016, 2019 & office 365. If you configured Outlook to download shared folders,