EWS Migration - Revision history

Ltalaschus at 14:13, 24 April 2026

2026-04-24T14:13:54Z

Ltalaschus at 10:19, 9 April 2026

2026-04-09T10:19:19Z

Rjansen at 10:13, 9 April 2026

2026-04-09T10:13:01Z

Ltalaschus at 15:00, 8 April 2026

2026-04-08T15:00:49Z

Ltalaschus: /* What Will Change for MailStore Server and the MailStore SPE? */

2026-01-20T14:27:46Z

What Will Change for MailStore Server and the MailStore SPE?

Cstelzmann: /* What Will Change for MailStore Server and the MailStore SPE? */

2026-01-13T11:44:21Z

What Will Change for MailStore Server and the MailStore SPE?

Ltalaschus: /* What Will Change for MailStore Server and the MailStore SPE? */

2026-01-13T11:20:34Z

What Will Change for MailStore Server and the MailStore SPE?

Ltalaschus: /* What Will Change for MailStore Server and the MailStore SPE? */

2026-01-13T11:14:38Z

What Will Change for MailStore Server and the MailStore SPE?

Ltalaschus at 14:09, 12 January 2026

2026-01-12T14:09:30Z

Ltalaschus at 13:31, 12 January 2026

2026-01-12T13:31:46Z

@@ Line 18: / Line 18: @@
 === How can MailStore support me during the migration? ===
-Make sure you have completed the app registration in Entra ID [[Synchronizing_User_Accounts_with_Microsoft_365_-_Modern_Authentication#Configuring_API_Permissions_in_Microsoft_Entra_ID|according to our instructions]]. In particular, the Mail.ReadWrite and IMAP.AccessAsApp permissions are now required.
+Make sure you have completed the app registration in Entra ID [[Synchronizing_User_Accounts_with_Microsoft_365_-_Modern_Authentication#Configuring_API_Permissions_in_Microsoft_Entra_ID|according to our instructions]]. In particular, the ''Mail.ReadWrite'' and ''IMAP.AccessAsApp'' permissions are now required.
 The [[Email_Archiving_with_MailStore_Basics|summary of archiving profiles]] contains the protocol used. Microsoft 365 Journal archiving profiles do not typically use EWS and are therefore not affected.

@@ Line 34: / Line 34: @@
 ==== June 2026 ====
-If you are an Exchange Online Kiosk, Microsoft Office 365, or Office 365 F1/F3 customer, all profiles must be migrated to Graph API and IMAP.
+If you are an Exchange Online Kiosk, Microsoft Office 365, or Office 365 F1/F3 customer, all profiles [https://techcommunity.microsoft.com/blog/exchange/update-to-ews-access-for-kiosk--frontline-worker-licensed-users/4474299 must be migrated] to Graph API and IMAP.
-Archiving Exchange Online archive mailboxes and Exchange Online Public Folders will [https://techcommunity.microsoft.com/blog/exchange/update-to-ews-access-for-kiosk--frontline-worker-licensed-users/4474299 no longer be possible].
+Archiving Exchange Online archive mailboxes and Exchange Online Public Folders will no longer be possible.
 ==== October 2026 ====

@@ Line 36: / Line 36: @@
 If you are an Exchange Online Kiosk, Microsoft Office 365, or Office 365 F1/F3 customer, all profiles must be migrated to Graph API and IMAP.
-Archiving Exchange Online archive mailboxes and Exchange Online Public Folders will no longer be possible.
+Archiving Exchange Online archive mailboxes and Exchange Online Public Folders will [https://techcommunity.microsoft.com/blog/exchange/update-to-ews-access-for-kiosk--frontline-worker-licensed-users/4474299 no longer be possible].
 ==== October 2026 ====

@@ Line 1: / Line 1: @@
-== Microsoft Is Discontinuing Its Exchange Web Services (EWS) for Microsoft 365 ==
+__NOTOC__
-Microsoft [https://techcommunity.microsoft.com/blog/exchange/retirement-of-exchange-web-services-in-exchange-online/3924440 has announced] that it will no longer support Exchange Web Services (EWS) for Exchange Online as of October 1, 2026. This decision affects all companies that use EWS in combination with Exchange Online (Microsoft 365).
+Exchange Web Services (EWS) is a technology that was developed specifically for accessing Exchange data. The API enables access to data from Microsoft Exchange Server and Exchange Online, including emails and mailboxes. EWS has been a central interface for third-party solutions such as archiving systems.
-EWS is a technology that was developed specifically for accessing Exchange data. The API enables access to data from Microsoft Exchange Server and Exchange Online, including emails and mailboxes. EWS has been a central interface for third-party solutions such as archiving systems.
+== Microsoft is discontinuing Exchange Web Services (EWS) for Microsoft 365 ==
-What Will Happen in October?
+Microsoft will [https://techcommunity.microsoft.com/blog/exchange/exchange-online-ews-your-time-is-almost-up/4492361 preconfigure and potentially restrict access] to EWS based on usage starting in August 2026. Administrators can also [https://learn.microsoft.com/en-us/exchange/client-developer/exchange-web-services/how-to-control-access-to-ews-in-exchange manage the settings themselves].
-Please note: If you use Exchange Online Kiosk, Microsoft Office 365, and Office 365 F1/F3, you should make the change by June. Further information can be found [https://techcommunity.microsoft.com/blog/exchange/update-to-ews-access-for-kiosk--frontline-worker-licensed-users/4474299 here].
+For customers using Exchange Online Kiosk, Microsoft Office 365, and Office 365 F1/F3,  [https://techcommunity.microsoft.com/blog/exchange/update-to-ews-access-for-kiosk--frontline-worker-licensed-users/4474299 Microsoft will disable EWS access as early as June 2026].
-== What Will Change for MailStore Server and the MailStore SPE? ==
+== What will change for MailStore Server and MailStore SPE? ==
-The shutdown of EWS initiated by Microsoft will require adjustments to MailStore Server and the MailStore SPE, depending on your archiving strategy.
+The shutdown of EWS initiated by Microsoft will require adjustments in MailStore Server and MailStore SPE, depending on the archiving strategy. Archiving methods within MailStore Server and MailStore SPE that previously have used EWS may no longer be able to connect after October 1st and will then encounter errors.
-The following profiles are expected to be affected from October onwards, Graph API does not expose access to these and support is effectifely dropped:
+== Which protocols does MailStore use? ==
-* Importing Exchange Online archive mailboxes
+Up to and including version 25.4, MailStore exclusively created Microsoft 365 archiving and export profiles that used EWS. Starting with version 26.1, new archiving profiles for regular mailboxes use the Graph API. New archiving profiles for archive mailboxes and public folders continue to use EWS, as these are not accessible via the Graph API. New export profiles, starting with version 26.2, use the IMAP protocol, since importing complete emails into a Microsoft 365 mailbox using the Graph API is also not possible.
-Regular Exchange Online Mailboxes and Shared Mailboxes are available using Graph API. New [[Archiving_Emails_from_Microsoft_365_-_Modern_Authentication|mailbox archiving profiles]] in MailStore will use Graph API starting with version 26.1.
+=== How can MailStore support me during the migration? ===
-The [[Email_Archiving_with_MailStore_Basics|summary panel]] of the archiving or export profile tells which protocol is used. Microsoft 365 Journal archiving profiles do not typically use EWS and are therefore not affected.
+Make sure you have completed the app registration in Entra ID [[Synchronizing_User_Accounts_with_Microsoft_365_-_Modern_Authentication#Configuring_API_Permissions_in_Microsoft_Entra_ID|according to our instructions]]. In particular, the Mail.ReadWrite and IMAP.AccessAsApp permissions are now required.
 [[de:EWS Migration]]
 [[en:EWS Migration]]

@@ Line 18: / Line 18: @@
 * Importing Exchange Online public folders
-Regular Exchange Online Mailboxes and Shared Mailboxes are available using Graph API. New [[Archiving_Emails_from_Microsoft_365_-_Modern_Authentication|mailbox archiving profiles]] in MailStore will use Graph API starting with version 26.1. New export profiles will change with version 26.2. Existing EWS archiving and export profiles will work until October 2026. We will offer a migration path in the coming months.
+Regular Exchange Online Mailboxes and Shared Mailboxes are available using Graph API. New [[Archiving_Emails_from_Microsoft_365_-_Modern_Authentication|mailbox archiving profiles]] in MailStore will use Graph API starting with version 26.1.
 The [[Email_Archiving_with_MailStore_Basics|summary panel]] of the archiving or export profile tells which protocol is used. Microsoft 365 Journal archiving profiles do not typically use EWS and are therefore not affected.

← Older revision		Revision as of 13:31, 12 January 2026
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	New [[Archiving_Emails_from_Microsoft_365_-_Modern_Authentication\|mailbox archiving profiles]] will use Graph API starting with version 26.1.		New [[Archiving_Emails_from_Microsoft_365_-_Modern_Authentication\|mailbox archiving profiles]] will use Graph API starting with version 26.1.
	The [[Email_Archiving_with_MailStore_Basics\|summary panel]] of the archiving or export profile tells which protocol is used.		The [[Email_Archiving_with_MailStore_Basics\|summary panel]] of the archiving or export profile tells which protocol is used.
		+
		+	[[de:EWS Migration]]
		+	[[en:EWS Migration]]