Migrating from ISS to Elasticsearch

The message store supports the following migration strategies:

Side by side migration



 Install a new message store. 

 Enable Elasticsearch and ISC on the new message store. 

 Migrate users from the old store to the new store with rehostuser. 

 Decommission the old store when all the users are migrated to the new store. 



In-place migration



 Upgrade the messaging server to 8.0.2.2. 

 Enable Elasticsearch and ISC. 

 Enable impurge if it is not enabled. </li>

 Restart the server. </li>

 Folders are scheduled for migration automatically when they are accessed. </li>

 Run &#x27;imcheck -H&#x27; to migrate all the folders. </li>

 Remove ISS event notification target and ISS client configuration on the message store. </li>

</ul>

See also:
 * Elasticsearch options
 * ISC options
 * Indexer options
 * notifytarget options