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Failback and restoration for application jobs

Failback and restoration of your application job will depend on how your protection was configured.

Restoring then failing back applications configured for DNS failover—If you configured your application protection for DNS failover, use these restoration and failback instructions.
Failback and restoration for applications configured for identity failover—If you configured your application protection for identity failover, use these failback and restoration instructions.

If you are protecting Exchange and if your source failure was such that you have to completely rebuild your source before you can failback and restore, use the following steps as a guideline for rebuilding the source server.

Install Windows, and any service packs, using the same name and IP address configuration as the original source, and then join the domain. See your Windows documentation for more information.
Login as a domain administrator or an equivalent account with full Exchange Administrator rights.
Install Exchange using the /DisasterRecovery switch, making sure that all of the components will be installed to the same location as the original source and the Action is set to Disaster Recovery. In addition, set the Microsoft Exchange Messaging and Collaboration Services and Microsoft Exchange System Management Tools to Disaster Recovery. You can disregard informational messages related to recovering from tape backup. See your Exchange documentation for more information.
Install any Exchange service packs or patches.
Install Double-Take Availability.
Copy the files exchfailover.exe and post_restore_sourcename_target_name.bat from the target to the new source, and then continue with failback and restoration.

If you are protecting SQL and if your source failure was such that you have to completely rebuild your source before you can failback and restore, use the following steps as a guideline for rebuilding the source server.

Install Windows, and any service packs, using the same name and IP address configuration as the original source, and then join the domain. See your Windows documentation for more information.
Install SQL using the same drive and directory settings as the original source.
Install Double-Take Availability, and then continue with failback and restoration.