Firstly suspend all the storage groups configured for Continous Replication:
First you need to reseed the database.This can be done using one of the following ways:
Seeding using the Update-StorageGroupCopy cmdlet:
You can use the Update-StorageGroupCopy cmdlet in the Exchange Management Shell to seed a storage group copy. You can also use the Update Storage Group Copy wizard in the Exchange Management Console to seed a storage group copy.
Manually copying the offline database:
This process dismounts the database and copies the database file to the same location on the passive node. If you use this method, there will be an interruption in service because the procedure requires you to dismount the database.
Once this is done then Resume the Continous Replication once again
Or you could also use the enable-storagegroupcopy command
For further reference go through the below link:
http://technet.microsoft.com/en-us/library/cc535020.aspx