How to add a new server to the farm to an existing search topology

%3CLINGO-SUB%20id%3D%22lingo-sub-2767099%22%20slang%3D%22en-US%22%3EHow%20to%20add%20a%20new%20server%20to%20the%20farm%20to%20an%20existing%20search%20topology%3C%2FLINGO-SUB%3E%3CLINGO-BODY%20id%3D%22lingo-body-2767099%22%20slang%3D%22en-US%22%3E%3CP%3EWe%20are%20running%20SharePoint%202016%20on-prem.%20I%20detached%20a%26nbsp%3B%20server%20that%20was%20part%20of%20the%20farm%20and%20also%20had%20the%26nbsp%3B%20%26nbsp%3BContent%20Processing%2C%20Analytics%20processing%20.%20When%20I%20reattached%20the%20server%20to%20the%20farm%20it%20no%20longer%20was%20part%20of%20the%20search%20topology%20with%20the%20components%20specified.%3C%2FP%3E%3CP%3EMy%20question%20is%201)%20how%20can%20I%20add%20it%20to%20an%20existing%20search%20topology%26nbsp%3B%26nbsp%3B%3C%2FP%3E%3CP%3E%26nbsp%3B%3C%2FP%3E%3CP%3E%3CSTRONG%3EError%20while%20cloning%3A-%26nbsp%3B%3C%2FSTRONG%3E%3C%2FP%3E%3CPRE%3E%3CSPAN%20class%3D%22%22%3E%24sa%3C%2FSPAN%3E%20%3D%20Get-SPEnterpriseSearchServiceInstance%20-Local%20%0A%3CSPAN%20class%3D%22%22%3E%24clone%3C%2FSPAN%3E%20%3D%20%3CSPAN%20class%3D%22%22%3E%24sa%3C%2FSPAN%3E.ActiveTopology.%3CSPAN%20class%3D%22%22%3EClone%3C%2FSPAN%3E()%20%3CBR%20%2F%3E%3CBR%20%2F%3EPS%20C%3A%5CWindows%5Csystem32%26gt%3B%20%24sa.ActiveTopology.Clone()%3CBR%20%2F%3EYou%20cannot%20call%20a%20method%20on%20a%20null-valued%20expression.%3CBR%20%2F%3EAt%20line%3A1%20char%3A1%3CBR%20%2F%3E%2B%20%24sa.ActiveTopology.Clone()%3CBR%20%2F%3E%2B%20~~~~~~~~~~~~~~~~~~~~~~~~~~%3CBR%20%2F%3E%2B%20CategoryInfo%20%3A%20InvalidOperation%3A%20(%3A)%20%5B%5D%2C%20RuntimeException%3CBR%20%2F%3E%2B%20FullyQualifiedErrorId%20%3A%20InvokeMethodOnNull%3C%2FPRE%3E%3CP%3E%26nbsp%3B%3C%2FP%3E%3CP%3E%26nbsp%3B%3C%2FP%3E%3C%2FLINGO-BODY%3E%3CLINGO-LABS%20id%3D%22lingo-labs-2767099%22%20slang%3D%22en-US%22%3E%3CLINGO-LABEL%3Efederated%20search%3C%2FLINGO-LABEL%3E%3C%2FLINGO-LABS%3E
Regular Visitor

We are running SharePoint 2016 on-prem. I detached a  server that was part of the farm and also had the   Content Processing, Analytics processing . When I reattached the server to the farm it no longer was part of the search topology with the components specified.

My question is 1) how can I add it to an existing search topology  

 

Error while cloning:- 

$sa = Get-SPEnterpriseSearchServiceInstance -Local 
$clone = $sa.ActiveTopology.Clone() 

PS C:\Windows\system32> $sa.ActiveTopology.Clone()
You cannot call a method on a null-valued expression.
At line:1 char:1
+ $sa.ActiveTopology.Clone()
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~
+ CategoryInfo : InvalidOperation: (:) [], RuntimeException
+ FullyQualifiedErrorId : InvokeMethodOnNull

 

 

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