In a normal state when the main site is available in a planned failover the result of the command will be the below This command will throw an error because this CMS is not available since it was present in the main site and main site is totally in accessible. Invoke-CsManagementServerFailover -Whatif We can try to run the below command to see the CMS status We can activate the DR edge services only during the DR scenarios. As a last resort also we can add simply 2 entries (hq & dr) on the DNS name spaces and stop the DR edge services. There are multiple ways to achieve this based on the network setup. So the CMS (Central Management Store) ,HQ fe pool and HQ edge services will not be accessible during this scenario.ġ) Configure in the DNS load balancer and make sure the edge server DNS name spaces are ready to accept connections in the DR site edge server. ![]() ![]() In case of unplanned failover its a total disaster where the main site will be completely unavailable. Procedure to activate unplanned DR failover: ![]() DR site must be made unavailable during normal scenario and connections to DR edge must be allowed only during DR scenario.ġ0) Required communication from HQ to DR FE,SQL should be present for the Pool replication to happen. ħ) DR sql store information must be published in the topology builder.Ĩ) Associated backup pool must be specified as DR Skype for business FE pool in the topology builder.DR file stores must be published in the topology builder.ĩ) HQ and DR site edge servers DNS name spaces can be load balanced. The deployment must have the below setup :ġ)Skype for Business HQ Front end, HQ SQL ,HQ OOS will be part of the HQ active directory site.Ģ) HQ site will have its dedicated Edge server.ģ) Skype for Business DR Front end, DR SQL and DR OOS will be part of the DR active directory site.Ĥ) DR site will have its dedicated Edge server.ĥ) DR front end, edge servers will be in the same Skype for Business Site since the site is a standby site.Ħ) Synchronous data Replication will be enabled between the HQ FE pool and the DR FE pool. However the DR setup must be provisioned in order for the DR activation to happen. This article outlines the unplanned failover and fail back for Skype for business.
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