Maximum Number of Online Search Folders per mailbox
Supported on: At least Windows Server 2008 R2 or Windows 7
Registry
HKCU
software\policies\microsoft\office\16.0\outlook\options\general Options
searchmaxnumberonline decimal
- range 0-999 Description
Specifies the maximum number of Search Folders that run on the Exchange server. The number of Search Folders running on the client computer is not affected.