outlook not connecting to office 365 exchange

Shared hosting: You bundle web and email hosting through a third-party provider.Third-party hosting: You rent email storage space on a third-party provider’s server.Self-hosting: You store emails on your own personal server.There are three primary email hosting models: In fact, it might more sense for you to consider alternatives to either Outlook or Exchange.īefore you start your search, you’ll want to make sure you understand the different email hosting options available to you. Worked on the very first try with no issues.Microsoft Outlook and Exchange are but two email hosting services in a sea of many and although they’re produced and provided by one of the world’s most recognizable software companies, that doesn’t necessarily mean they’re right for every organization. Take only the domain part.Īny change in one of these parameters caused an Unauthorized exception.īasic authentication is no longer supported by Microsoft.įollow this article on how to connect to EWS via OAuth. The easiest way is to find the fallback domain in the form of. You can find the domain in the Microsoft 365 admin center under Settings -> Domains. User must be the full email address of the user.ĭomain is the NetBIOS domain name, meaning it is only the domain name. What did work is the following: ExchangeService service = new ExchangeService(ExchangeVersion.Exchange2013_SP1)Ĭredentials = new WebCredentials('user', 'password', 'domain'),ĪutodiscoverUrl did not complete successfully, it failed to discover the URL every time There appear to have been a few changes in EWS connection to office365 in regards to security, causing Matt's answer to not work for me.

Outlook not connecting to office 365 exchange