Basic Authentication Deprecation in Exchange Online – News !

As you know, the “Basic Authentication” configuration was turned off last month.
Organizations using Exchange Online are now protected from the vulnerabilities of legacy authentication.

However, this closure process will continue On December 31, 2022, with exemptions.

Microsoft says ;
Once Basic auth for Outlook, Exchange ActiveSync and Exchange Web Services has been permanently disabled in your tenant, there’s really no reason to keep Autodiscover enabled for Basic auth. So, we’re turning off Autodiscover next.

For more details ; Basic Authentication Deprecation in Exchange Online – What’s Next

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Basic Authentication Deprecation Reminder and Final Update in Exchange Online

Starting October 1, Microsoft will begin to randomize tenants and disable basic authentication access for MAPI, RPC, Offline Address Book (OAB), Exchange Web Services (EWS), POP, IMAP, Exchange ActiveSync (EAS), and Remote PowerShell.
As you know, SMTP AUTH will not be affected by the changes made.

On the day of the change, Microsoft will notify each tenant through the Service Status Dashboard.

Microsoft 365 Admin Center

If you’re not ready to make these changes, You can do a One-Time Re-Enablement one last time as decided by Microsoft.

For all the details; Basic Authentication Deprecation in Exchange Online – September 2022 Update


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Microsoft Exchange Community (MEC) Technical Airlift 2022

MEC is Back !

What is MEC ?

MEC has been known as the Microsoft Exchange Conference but this year it was renamed the Microsoft Exchange Community. As the name suggests, it is a Microsoft Exchange Family specific event. MEC features experts from Microsoft and elsewhere talking about Exchange Online, Exchange Hybrid, and Exchange Server.

The first MEC was held in San Diego, California in 1997.
After San Diego, in Boston (1998), Atlanta, Hamburg, and Tokyo (1999), Dallas, Singapore, Nice, and Tokyo (2000), Orlando and Nice (2001), and Anaheim (2002).

This is a free, digital event for IT professionals who work with Exchange Online and/or Exchange Server day-to-day, and ISVs and developers who make solutions that integrate with Exchange, which will take place Sept 13-14, 2022!

The Exchange Online and Exchange Server engineering teams have a lot of great content for customers and partners.

Register now for this free digital event to:

Exchange Server Roadmap

Exchange Server Feature Review

Delighting Exchange Online Admins

Expanding Usage and Security of Email in Exchange Online

Exchange Online Transport Future Initiatives: Bulk Mail and Exchange Transport Rules

Basic Auth Deprecation in Exchange Online

Exchange Online Support for Continuous Access Evaluation

Customer Key in Exchange Online

Prepare yourself for two days jam-packed with networking, unparalleled access to Exchange engineers and MVPs and, of course, the most in-depth information on Exchange you’ll find anywhere.

Thanks for bringing these MEC back !

Exchange Recipient Type Values

I don’t know where and when this information will be useful to you, but I needed these values in a few problems I had, maybe you will need them one day.

There are three critical recipient values used by Exchange Server;

  • msExchRecipientDisplayType
  • msExchRecipientTypeDetails
  • msExchRemoteRecipientType

There is the only supported way to change these values is using the Exchange Admin Center or using the Exchange Management Shell.

msExchRecipientDisplayType Value (Decimal)
MailboxUser 0
DistributionGroup 1
PublicFolder 2
DynamicDistributionGroup 3
Organization 4
PrivateDistributionList 5
RemoteMailUser 6
ConferenceRoomMailbox 7
EquipmentMailbox 8
ArbitrationMailbox 10
MailboxPlan 11
LinkedUser 12
RoomList 15
SyncedMailboxUser -2147483642
SyncedPublicFolder -2147483130
SyncedDynamicDistributionGroup -2147482874
SyncedRemoteMailUser -2147482106
SyncedConferenceRoomMailbox -2147481850
SyncedEquipmentMailbox -2147481594
SecurityDistributionGroup 1043741833
RBAC Role Group 1073741824
msExchRecipientTypeDetails Value (Decimal)
UserMailbox 1
LinkedMailbox 2
SharedMailbox 4
LegacyMailbox 8
RoomMailbox 16
EquipmentMailbox 32
MailContact 64
MailUser 128
MailUniversalDistributionGroup 256
MailNonUniversalGroup 512
MailUniversalSecurityGroup 1024
DynamicDistributionGroup 2048
PublicFolder 4096
SystemAttendantMailbox 8192
SystemMailbox 16384
MailForestContact 32768
User 65536
Contact 131072
UniversalDistributionGroup 262144
UniversalSecurityGroup 524288
NonUniversalGroup 1048576
Disable User 2097152
MicrosoftExchange 4194304
ArbitrationMailbox 8388608
MailboxPlan 16777216
LinkedUser 33554432
RoomList 268435456
DiscoveryMailbox 536870912
RoleGroup 1073741824
RemoteUserMailbox 2147483648
RemoteRoomMailbox 8589934592
RemoteEquipmentMailbox 17179869184
RemoteSharedMailbox 34359738368
PublicFolderMailbox 68719476736
Team Mailbox 137438953472
RemoteTeamMailbox 274877906944
MonitoringMailbox 549755813888
GroupMailbox 1099511627776
LinkedRoomMailbox 2199023255552
AuditLogMailbox 4398046511104
RemoteGroupMailbox 8796093022208
SchedulingMailbox 17592186044416
GuestMailUser 35184372088832
AuxAuditLogMailbox 70368744177664
SupervisoryReviewPolicyMailbox 140737488355328
msExchRemoteRecipientType Value (Decimal)
ProvisionedMailbox (Cloud Mailbox) 1
ProvisionedArchive (Cloud Archive) 2
ProvisionedMailbox, ProvisionedArchive (Cloud Mailbox & Cloud Archive) 3
Migrated 4
Migrated, ProvisionedArchive (Migrated Mailbox & Cloud Archive) 6
DeprovisionMailbox 8
ProvisionArchive, DeprovisionMailbox 10
DeprovisionArchive 16
ProvisionMailbox, DeprovisionArchive 17
DeprovisionArchive, Migrated 20
ProvisionMailbox, Migrated, DeprovisionArchive 21
DeprovisionMailbox, DeprovisionArchive 24
RoomMailbox 32
ProvisionMailbox, RoomMailbox 33
ProvisionMailbox, ProvisionArchive, RoomMailbox 35
Migrated, RoomMailbox 36
ProvisionArchive, Migrated, RoomMailbox 38
ProvisionMailbox, DeprovisionArchive, RoomMailbox 49
Migrated, DeprovisionArchive, RoomMailbox 52
EquipmentMailbox 64
ProvisionMailbox, EquipmentMailbox 65
ProvisionMailbox, ProvisionArchive, EquipmentMailbox 67
Migrated, EquipmentMailbox 68
ProvisionArchive, Migrated, EquipmentMailbox 70
ProvisionMailbox, DeprovisionArchive, EquipmentMailbox 81
Migrated, DeprovisionArchive, EquipmentMailbox 84
SharedMailbox 96
ProvisionMailbox, SharedMailbox 97
Migrated, SharedMailbox 100
ProvisionArchive, Migrated, SharedMailbox 102
Migrated, DeprovisionArchive, SharedMailbox 116

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Minimum Outlook for Windows version requirements for Microsoft 365

After November 1, 2021, only Outlook 2013 Service Pack 1 (with latest fixes) and later will be able to connect to Microsoft 365 services.

Not supported versions;

  • Outlook 2007
  • Outlook 2010
  • Office 2013 versions earlier than 15.0.4971.1000
  • Office 2016 versions earlier than 16.0.4600.1000

Outlook 2007 or Outlook 2010 is blocked from connecting to Exchange Online.
Users can immediately start using Outlook on the web through a browser.

If you want to find the outlook version information used in your tenant organization, you can use the “Microsoft 365 Reports in the admin center – Email apps usage.

Have a nice day !