Modifying Content Manager Installation unattended

Question

We have created Power shell scripts to Install SDL Web 8.5 CMS in unattended mode. Now we need to Install Translation Manager Feature, We can add that using "TranslationManager_SelectedFeatures" and Set that attribute to All. How to pass action parameter as "Modify" so that only that feature will be installed without overriding current installed feature.

Answer 1

After enabling $Params.Add("TranslationManager_SelectedFeatures", '(All)') appended to existing configured parameters and by providing below parameters in script

$Params.Add("TM_TS_LIST","")              
$Params.Add("TM_TMS_ADDRESS","")                                                
$Params.Add("TM_TMS_PORT","")                                                    
$Params.Add("TM_DB_SERVER","(local)")                              
$Params.Add("TM_DB_NAME","Tridion_TranslationManager")   
$Params.Add("TM_DB_USER","TMUser")                               
$Params.Add("TM_DB_PASSWORD","")     

and while installing append -modify as shown below

SDLWeb85CM.exe -s -modify 

Its installed Translation Manager alone without effecting other installed features.