This setting is used to provide support for legacy checksums in Pop integration URLs. Legacy checksums are created in versions of OnBase prior to version 14, created without using a unique string value as a checksum key, or created from a current version of OnBase that has the EnableLegacyChecksumCreation option in the Application Server web.config file set to true. By default, this setting is set to false.
Set EnableLegacyChecksumFallback to true in order to allow legacy checksums to be validated.
If this option is set to false, then legacy checksums will not validate and users will be unable to view documents whose generated URLs contain a legacy checksum. If this option is set to false, then EnableLegacyChecksumCreation must also be set to false.