Merge pull request MicrosoftDocs#7937 from get-itips/patch-360

Clarifying

Author: v-dihans

sharepoint/sharepoint-ps/sharepoint-server/Backup-SPFarm.md

@@ -201,6 +201,8 @@ Accept wildcard characters: False
 ### -ConfigurationOnly
 If set, the backup will contain configuration settings only (no data) for each of the objects to be backed up.
 
+SharePoint may overestimate the amount of space required for a configuration-only backup, which may result in SharePoint estimating that it doesn't have sufficient space to store the backup at the specified path. Use the `-Force` parameter in this situation to proceed with the backup if you have sufficient space to store the configuration-only backup.
+
 ```yaml
 Type: SwitchParameter
 Parameter Sets: (All)
@@ -325,4 +327,3 @@ This cmdlet supports the common parameters: -Debug, -ErrorAction, -ErrorVariable
 ## NOTES
 
 ## RELATED LINKS
-