Office 365 Exchange Online Server Settings

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Starting October 1, 2022, Microsoft is starting to disable an older method of signing in to Exchange Online called “Basic Authentication.” This outdated method is vulnerable to various types of password attacks. The new authentication standard is based on a standard called OAuth, and Microsoft’s implementation of the standard is called “Modern Authentication.”

Office 365 Exchange Online Server Settings

Office 365 Exchange Online Server Settings

Some customers may not be able to sign in to email after disabling the old sign-in method in their organization.

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When basic authentication is disabled for your organization, but various email clients still use it, there are two things to keep in mind:

You can re-enable basic authentication with your tenant using our self-service diagnostics. By clicking this button you start self-help diagnostics, which will take you to diagnostics in the Microsoft 365 admin center (if you are a global administrator):

Or, you can open the Microsoft 365 admin center and click the green Help and Support button in the lower-right corner of the screen:

Clicking on the Help and Support button will take you to our self-help system. Here you can enter Diag phrase: run basic authentication on EXO and then run test. The test results will look like the following (results will depend on what we disabled for your organization):

Office365 Smtp , Pop3 Und Imap Einstellungen

You can enable basic authentication for each protocol you need (individually). If you tell the base creation for the protocol to run again within an hour (often much sooner), it will start working again.

Keep in mind that by re-enabling basic authentication for the protocol, your users and data are more vulnerable to security risks.

However, if you use some type of mobile device management (MDM/MAM) solution, you must use it to deploy new profiles. For example, you can use Intune to set up Creativity for iPhone and iPad. If you are using Basic Mobility and Security, please refer to this document for more information on configuring these devices.

Office 365 Exchange Online Server Settings

There may be some less common clients that stop working when basic authentication is disabled. Here’s how to work with them:

Exchange Online Archives

If app passwords are used as an additional authentication method for MFA (Multi-Factor Authentication) along with Basic Authentication, App Pass used for MFA Word will stop working when Basic Authentication is disabled.

You must be a registered user to add a comment. If you are already registered, please login. Otherwise, register and login. The following instructions walk you through the process of manually setting up your Office 365 Exchange online account with Outlook 2010, 2013, and 2016 for Windows. This may be required when setting up a secondary account or if you have problems with the automatic configuration process.

You cannot manually set up a new Microsoft Exchange account running Outlook. So, before starting this procedure, make sure that Outlook is not running on your computer.

Outlook 2010 users should apply the latest Windows updates before performing this task. To check for and install the latest Windows updates, proceed as follows.

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At this point, you may be asked to sign in to your Office 365 account. If so, log in as usual and proceed to the next step.

After the desktop setup is complete, you may need to restart your computer. Your version of Outlook is now up to date and you can proceed to establish a connection to the Microsoft Exchange server.

If you don’t see the Mail option, change your view (top right corner of Control Panel) to Large Icons or Small Icons.

Office 365 Exchange Online Server Settings

If the following window appears, Outlook has been detected running on your computer. To continue, you need to close Outlook before proceeding with the process.

Exchange 2013 Platform Options

Do not click the Name Validation button at this step. If you do this, the configuration will fail.

A basic connection to the Microsoft Exchange server is now configured and you can proceed to configure security and connection details.

The security and connection details are now set and you can proceed to test, verify and complete the process.

If you prefer, check the Remember my credentials checkbox to skip this verification step in the future.

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Office 365 Exchange Online Server Settings

Non-essential cookies are cookies that are not necessary for the website to function and are used specifically to collect user’s personal data through analytics, advertisements, other embedded content. It is mandatory to obtain user consent before enabling these cookies on your website. I still have an Exchange 2016 environment after removing the resource forest, but all my mailboxes are in Office 365. Users are provisioned in Active Directory, remote mailboxes. Exchange 2016 is provided and everything is synced with Office 365 using Azure AD Connect.

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Do I still need an Exchange Hybrid configuration? A hybrid architecture is not required unless there are plans to move resources back to the on-premises exchange. To be in a supported configuration, an Exchange server is required on-premises for administrative purposes, but only Azure AD Connect is required and not a full hybrid configuration.

Note. If you want to use an on-premises Exchange server for SMTP relay purposes, you also don’t need a hybrid configuration. Just make sure you have the SMTP Send Connector pointing to Exchange Online Security and you’re good to go.

Autodiscover does not require on-premises Service Connection Points (SCP) when all Exchange resources are in Exchange Online. But make sure you have valid CNAME records for Autodiscover pointing to

Here’s a catch, this will also remove the outgoing Office 365 Send Connector from Exchange. If you want to get SMTP relay for your mailboxes in Exchange Online, you need to recreate this connector manually (for this, use as smart host application).

Exchange Online From Microsoft

In the Exchange Online admin center, remove the SMTP connectors from Exchange Online to your on-premises Exchange organization. If you want to do SMTP routing, keep the incoming SMTP connector or remove it as well.

To remove a hybrid enterprise share from Exchange Online, go to Enterprise. Share and remove an organization share in the Exchange admin center.

In this blog post, I’ll explain how to remove a hybrid configuration from your Exchange environment after you’ve moved all resources to Exchange online.

Office 365 Exchange Online Server Settings

For administrative purposes, an on-premises Exchange server is still required. Even after removing the hybrid configuration, you can exchange your recipient online using an on-premises Exchange server, and all changes will be replicated through Azure Active Directory.

Hybrid Deployment In Office 365

Still need the last Exchange server on campus? Yes, you need it to manage your recipients in Exchange Online. When Azure AD Connect is running in your environment, objects are organized in on-premises Active Directory. The source of authority is Active Directory. An on-premises Exchange server is required until Microsoft fixes the source of the authentication problem. While in Office 365 Outlook Web Access, click the Gear icon at the top right and select View all Outlook settings.

2. Click Mail on the left, Sync Mail on the right and scroll down to POP and IMAP.

Note: Make sure you are not set to use POP in your email client. Because your folders are hosted on your 365 Mail hosting server, you won’t be able to see them if any email program you use has outdated POP settings. For more information on POP limits, visit us at

Tip: The IMAP server address for older Office 365 accounts may differ from the typical settings shown in our example image. If necessary, follow the steps above to self-verify your account.

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If your screen is like below, first select “Mail” option and go to preferences screen.

Office365 cannot handle non-ascii characters in your password. If you get incorrect password errors when trying to register, make sure you are using only ascii characters. You can check which characters you are allowed to use by clicking this link.

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