How long to retain transaction log backups on the source storage volume

SnapCenter Plug-in for Microsoft Exchange Server needs transaction log backups to perform up-to-the-minute restore operations, which restore your database to a time between two full backups.

For example, if Plug-in for Exchange took a full plus transaction log backup at 8:00 a.m. and another full plus transaction log backup at 5:00 p.m, it could use the latest transaction log backup to restore the database to any time between 8:00 a.m. and 5:00 p.m. If transaction logs are not available, Plug-in for Exchange can perform point-in-time restore operations only, which restore a database to the time that Plug-in for Exchange completed a full backup.

Typically, you require up-to-the-minute restore operations for only a day or two. By default, SnapCenter retains a minimum of two days.