Acronis Recovery for Microsoft Exchange - User Guide - Manual (Page 52)

Click Next to provide a password, if one is required, for archives in the selected
backup location.
7.3 Providing a Password
If there are any password-protected backup archives in the location you have selected
(see 7.2), you will need to enter the password to clean up the archive location.
Click Next to continue.
7.4 Specifying Cleaning Options
At this step specify the GFS or Simple (selected by default) scheme to use for location
cleaning.
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