OALGen encountered error 80004005 while cleaning the offline address list public folders under /o=OurCompany/cn=addrlists/cn=oabs/cn=Offline address book.
Get-PublicFolder "\non_ipm_subtree\offline address book\/o=OurCompany/cn=addrlists/cn=oabs/cn=Offline address book" -Recurse |Set-PublicFolder -Replicas "Public Folder Group\public folders"
Get-PublicFolder "\non_ipm_subtree\offline address book\/o=OurCompany/cn=addrlists/cn=oabs/cn=Offline address book" -Recurse | Set-PublicFolder -ReplicationSchedule $alwaysrun
Replace the relevant items with your own database paths and company names. Our system has “Public Folder Group\Public Folders” as the database name, but I think default is “Second Storage Group\Public Folder Database”, so watch for that.