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Did you included all the SMTP domain during the configuration.
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Did you included all the SMTP domain during the configuration.

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sorry, can you explain your question?
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We have Exchange 2010 and o365 in a hybrid environment. &nbsp;We setup new mailboxes and migrate them to the cloud. We also migrate old mailboxes to the cloud. &nbsp;<br />
<br />
Currently, we need to add a SMTP address to an on-prem mailbox and for some reason, it is not being shown in the cloud.<br />
<br />
If someone has an idea of what to check, please advise. &nbsp;<br />
<br />
Other SMTP addresses of the cloud mailbox are working.<br />
<br />
Thanks.
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We have Exchange 2010 and o365 in a hybrid environment.  We setup new mailboxes and migrate them to the cloud. We also migrate old mailboxes to the cloud.  

Currently, we need to add a SMTP address to an on-prem mailbox and for some reason, it is not being shown in the cloud.

If someone has an idea of what to check, please advise.  

Other SMTP addresses of the cloud mailbox are working.

Thanks.

A proxy address is not being &quot;transferred&quot; to the cloud mailbox from on-prem

Exchange is the server side of a collaborative application product that is part of the Microsoft Server infrastructure. Exchange's major features include email, calendaring, contacts and tasks, support for mobile and web-based access to information, and support for data storage.

Exchange

Office 365 is a group of software plus services subscriptions that provides productivity software and related services to its subscribers. Office 365 allows the use of Microsoft Office apps on Windows and OS X, provides storage space on Microsoft's cloud storage service OneDrive, and grants 60 Skype minutes per month. Office 365 includes e-mail and social networking services through hosted versions of Exchange Server, Skype for Business Server, SharePoint and Office Online, integration with Yammer, as well as access to the Office software. All of Office 365's components can be managed and configured through an online portal; users can be added manually, imported from a CSV file, or Office 365 can be set up for single sign-on with a local Active Directory using Active Directory Federation Services.

Microsoft 365

Windows PowerShell is a task automation and configuration management framework from Microsoft, consisting of a command-line shell and associated scripting language built on the .NET Framework. PowerShell provides full access to the Component Object Model (COM) and Windows Management Instrumentation (WMI), enabling administrators to perform administrative tasks on both local and remote Windows systems as well as WS-Management and Common Information Model (CIM) enabling management of remote Linux systems and network devices.

A proxy address is not being &quot;transferred&quot; to the cloud mailbox from on-prem

A proxy address is not being "transferred" to the cloud mailbox from on-prem