I wrote a custom compliance policy to check if Bitlocker exists and the device status shows as Compliant but the compliance report shows as Error in the compliance policy report.

$blDrive = Get-BitLockerVolume | Where-Object {$_.MountPoint -eq "C:"}

$Percentage = [int64]$blDrive.EncryptionPercentage $ProtectionStatus = [int64]$blDrive.ProtectionStatus

$hash = @{

Percentage = $Percentage;ProtectionStatus = $ProtectionStatus} return $hash | ConvertTo-Json -Compressed -----------------------------------------------------------------------

{

"Rules":[{"SettingName": "Percentage","Operator": "IsEquals","DataType": "Int64","Operand": 100,"MoreInfoURL": "https://support.microsoft.com/en-au","RemediationStrings":[{"Language": "en_US","Title": "BitLocker Drive must be fully encrypted","Description": "BitLocker Drive must be fully encrypted"}]},{"SettingName": "ProtectionStatus","Operator": "IsEquals","DataType": "Int64","Operand": 1,"MoreInfoURL": "https://support.microsoft.com/en-au","RemediationStrings":[{"Language": "en_US","Title": "BitLocker Drive must be enabled","Description": "BitLocker Drive must be enabled"}]}]}