FortiManager supports network operations use cases for centralized management, best practices compliance, and workflow automation to provide better protection against breaches.
Article Id 192959
This article explains how to validate the connection status of a FortiManager device to FortiGuard services.

Execute the next commands:
# diagnose fmupdate update-status fgd            ----> Display update status
# diagnose fmupdate update-status fds
# diagnose fmupdate view-service-info [fds|fgd]  ----> Display service info
# diagnose fmupdate fgd-dbver                    ----> Get version of database

This also provides update information for the managed devices

For example:
FMG1000D #  diagnose fmupdate update-status fds
Response=202|UpdatedDate=2017-05-05|UpdatedTime=20:59:32|LastSuccessDate=2017-05 05|LastSuccessTime=20:59:43|Status=0|UpullStat=Connected|UpullErr=Connect error|UpullServer=|TotalObjNum=7|CurrentObj=7|DownloadSize=15384|TotalPackageSize=15384

FMG1000D #  diagnose fmupdate update-status fgd
Response=202|UpdatedDate=2017-05-05|UpdatedTime=21:09:11|LastSuccessDate=2017-05 05|LastSuccessTime=21:09:11|Status=0|UpullStat=Synced|UpullErr=|UpullServer=|TotalObjNum=4|CurrentObj=4|DownloadSize=1376|TotalPackageSize=1376

FMG1000D # diagnose fmupdate fgd-dbver
URL Database Version: 00019.24884
Last Updated: 2017-05-05  15:39:58
Spam Database 1: 99.39961
Last Updated: 2017-05-05  14:40:01
Spam Database 2: 88.44392
Last Updated: 2017-05-05  14:53:01
Spam Database 4: 75.27306
Last Updated: 2017-05-05  15:06:01
AV Query Database Version: 00025.00432
Last Updated: 2011-11-14  17:04:03
File Query Database Version: 00000.00000
Last Updated: -  -
FMG1000D #