Category: Windows

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Exchange Online / Microsoft 365 SMTP settings

Generic settings

  • SMTP server: smtp.office365.com
  • Port: 587
  • Requires SSL: Yes
  • Requires TLS: Yes (if available)
  • TLS version : 1.2
  • Authentication: Yes
  • Username: email address
  • Password: Your passwor

User configuration

SMTP sending is not enabled by default.

  • Log in as administrator to the account
  • Tab – Mail
  • Click on “Manage email applications”
  • Select Authenticated SMTP
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Microsoft MFA : Enabled or Enforced

Multi Factor Authentication (MFA)

Microsoft recommends using multi factor authentication for global tenant administrators. If you don’t do this, 60 days after the last reminder from Microsoft, the tenant is deactivated.

Warning: it’s not enough to activate 2-factor authentication … you also have to use it.

Enabled or Enforced

The problem is that activation is not enough. In fact, after activating the user, he must also log in with the MFA: at this point the user’s status changes from Enabled to Enforced.

You don’t have to have Global Admin with MFA in Enabled status but only in Enforced status.

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Office 365 : note

Office

External Member

Use Contact in Admin page

External Member and Group

You can add an external member to a group

Groups and shared Mailbox : same features

  • Users can send-as or send-on-behalf of a Group mailbox, just as they would a shared mailbox.

Office 365 Groups : additional features

  • Users (members) can subscribe to receive a copy in their own mailbox of the emails sent to the Group mailbox, which makes Groups closed to distribution lists.
  • Groups include additional apps as a SharePoint team site, OneNote notebook, Planner, and Teams.
  • Groups have a guest access model for external collaboration that shared mailboxes do not (Contacts).

shared mailboxes : additional features

  • Shared mailboxes can have sub-folders in the mailbox, whereas Group mailboxes can’t.
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Restrictions and limitations in OneDrive Web Download

onedrive

We had a problem downloading folders using Onedrive web. Under some conditions the download of a folder stops or the result does not contain all the files of the source folder.
When we contacted Microsoft, we learned that there is a limit on downloading folders using Onedrive web:

  • The folder cannot contain more than 50,000 files
  • The single file cannot exceed 15GB in size.

Microsoft recommends using Onedrive client.