This CU provides the following fixes and improvements (https://support.microsoft.com/en-gb/help/4099852/cumulative-update-10-for-exchange-server-2016)
- 4056609 – Event ID 4999 and mailbox transport delivery service won’t start with Exchange Server 2016 CU7 installed
- 4133605 – Cmdlets to create or modify a remote shared mailbox in an on-premises Exchange environment
- 4133620 – “HTTP 500 due to ADReferralException” error when a user tries to view detail properties of mailboxes in a child domain in Exchange Server
- 4095974 – “System.InvalidOperationException” occurs when the “Enable-MailPublicFolder” cmdlet is run against a public folder in Exchange Server
- 4095973 – Set-ServerComponentState cmdlet does not honor the write scope defined in the RBAC management scope in Exchange Server
- 4095993 – HTTP 500 error when an administrator tries to manage regional settings in ECP on Windows Server 2016
- 4294209 – Cannot clear the “Maximum message size” check box for Send messages or Receive messages in EAC in Exchange Server 2016
- 4294208 – “TooManyObjectsOpenedException” error when you run the “Get-PublicFolderMailboxDiagnostics” cmdlet in Exchange Server
- 4294212 – Cannot send VBScript-created messages in the Outlook 2016 client
- 4294211 – Cannot run “Set-CalendarProcessing” cmdlets after you apply CU8 or CU9 for Exchange Server 2016
- 4294210 – Cannot edit an email attachment in OWA in an Exchange Server 2016 environment
- 4294204 – Changing “IsOutOfService” to “False” in an earlier Exchange Server version does not immediately update in a later Exchange Server environment
- 4092041 – Description of the security update for Microsoft Exchange Server 2013 and 2016: May 8, 2018
You can download this CU from https://www.microsoft.com/en-us/download/details.aspx?id=57068&WT.mc_id=rss_alldownloads_all