i can't access mongod.exe using windows powershell

[KArim22211]

dbs : The term 'dbs' is not recognized as the name of a cmdlet, function, script file, or operable program. Check the spelling of the name, or if a path was included, verify that the path is correct and try again. At line:1 char:1

• dbs = Get-MailboxDatabase

• 
  + CategoryInfo          : ObjectNotFound: (dbs:String) [], CommandNotFoundException
  + FullyQualifiedErrorId : CommandNotFoundException