KB Article #176556

Cluster join is not allowed when there is no external storage configured on primary appliance. (517)

Problem

Upon joining a secondary node to a primary MailGate node in a local cluster, the following error is displayed on the secondary's Admin UI:



Resolution

This happens when Secure Collaboration functionality (Secure Mailbox or Secure Folder, or both) is enabled in the installed license. The High Availability Secure Collaboration cluster requires configuring an external storage, thus the external storage is a must in order to join SC-enabled MailGate nodes into a local cluster, no matter if the Secure Collaboration is actively used or not. The requirements for setting up an external storage can be found in MailGate Administrator's Guide.

NOTE: If none of the Secure Collaboration features are licensed, the clustering is done as usual - without external storage and follows the steps listed in the Administrator's Guide.

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