@Shahban Server ID is not the same as Computer ID . Add Internal Computer ID this is from BFI) and Data Source Computer ID (this is from BigFix) to your report, and you’ll see what I mean.
Server ID is a BFI generated value derived from the patterns found in one two of advanced server settings: standaloneServerTagTemplate and managedServerTagTemplate and so, is found only in BigFix Inventory reports.
You can find more information about the Server ID report column in the documentation here. You can find more information about the advanced server settings in the documentation here.