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We have changed our companies domain name and I am done on our Exchange( 0ffice365 cloud) so that our users can get emails with the new domain name. In fact, all outgoing messages is going out using the new smtp address with the new domain name. ( i.e First-initialLastname@newd<wbr />omain.com)<wbr /> . We have about 70 users. <br />
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What would be the best way for our users or our company to notify our clients/partners so that they update their contact info? &nbsp; I guess am not sure what the best approach would be technically and logistically?
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We have changed our companies domain name and I am done on our Exchange( 0ffice365 cloud) so that our users can get emails with the new domain name. In fact, all outgoing messages is going out using the new smtp address with the new domain name. ( i.e First-initialLastname@newdomain.com) . We have about 70 users. 

What would be the best way for our users or our company to notify our clients/partners so that they update their contact info?   I guess am not sure what the best approach would be technically and logistically?

How to notifiy contacts / senders about a new email domain address change

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.