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1
Month in brief

SharePoint OTP retirement shifts external sharing to Entra B2B mid-October

Starting mid-October 2026, SharePoint One-Time Passcode authentication will retire and SharePoint and OneDrive external sharing will move to Microsoft Entra B2B guest accounts across Microsoft 365 tenants. A second major update opens self-service onboarding for new Microsoft Entra App Gallery applications in public preview, with general availability beginning in mid-November. Documentation changes also carry concrete provisioning consequences for Connect Sync and SAP SuccessFactors workload identities; most remaining updates cover guest-lifecycle guidance, CSV procedures, naming, and endpoint examples.

  • External ID · Conditional Access
    SPO OTP retirement begins in mid-October 2026

    SharePoint One-Time Passcode authentication will retire starting in mid-October. SharePoint and OneDrive external sharing will use Microsoft Entra B2B instead, requiring external users to have guest accounts and enabling consistent governance and Conditional Access.

  • New-application submitters can validate SSO and provisioning integrations, manage submissions, and track status in the Microsoft Entra admin center. Public preview is available now; general availability begins in mid-November 2026. The message says no action is required.

  • The hardening guidance extends the deadline from September 30, 2026, to April 7, 2027, while retaining Microsoft Entra Connect Sync 2.5.79.0 or later as the minimum. It warns that synchronization services will fail until the upgrade is complete.

  • The guide changes the required Microsoft Entra Connect version from 2.5.79.0 to 2.6.84.0 or later and adds application-based authentication as a requirement for maintaining directory synchronization and avoiding service disruption.

  • The updated guide removes the Preview label and limits reuse: the workload identity’s Application API host must match the provisioning app’s SAP SuccessFactors API host. It also adds the Application ID URI format and compatibility details for the September 15, 2026 update.

For Entra administrators

External users will need guest accounts for affected SharePoint and OneDrive sharing scenarios, so administrators should review guest governance and Conditional Access coverage. Apply the Connect requirement that matches each deployment: the general hardening guidance sets a 2.5.79.0-or-later deadline of April 7, 2027, while the AD FS/PingFederate guide requires version 2.6.84.0 or later plus application-based authentication. For SAP SuccessFactors provisioning, ensure the workload identity and provisioning app use the same API host. No action is required for the App Gallery onboarding preview.

This period briefing was generated by AI from the tracked Microsoft Learn and Message Center changes.

15 updates by product

5

Bulk create users in the Azure portal

Doc update

The documentation now requires preserving downloaded column headings, allows the examples row to remain, and identifies only Name, User name, and Initial password as required fields. The sample CSV was simplified.

1 October 2026

Bulk delete users in Microsoft Entra ID

Feature updateAction required

The instructions now require the exact downloaded column header and allow each user row to contain either a user principal name or object ID. The examples row may remain, and User Administrator is listed as the minimum role.

1 October 2026

Bulk restore deleted users in the Azure portal

Doc update

The article now requires the downloaded `Object ID [objectId] Required` header to remain unchanged and says the examples row can be retained. It also documents the User Administrator prerequisite.

1 October 2026
2
1
1
1

Authorization Agent Id

Doc update

The documentation now describes blocked highly privileged directory roles for agent identities without the obsolete custom-role restriction wording.

1 October 2026
2

Manage sponsored guests in My Access

Doc updateAction required

The new page documents the preview experience for reviewing guests, extending or ending sponsorship, and sponsoring eligible unsponsored guests. It also explains policy-driven lifecycle behavior.

1 October 2026
1

Retirement of SharePoint One-Time Passcode (SPO OTP) and transition to Microsoft Entra B2B

New

SharePoint One-Time Passcode (SPO OTP) authentication will retire starting mid-October 2026, transitioning external sharing and authentication to Microsoft Entra B2B. This change affects all Microsoft 365 tenants, requiring guest accounts for external users and enabling consistent governance and Conditional Access across SharePoint and OneDrive.

1 October 2026
Message CenterMC1243549 on mc.merill.net ↗Major updatePlan for change
1

Configure workload identity-based authentication for SAP SuccessFactors provisioning

Generally availableAction required

The guide removes the Preview label and documents that workload identities are reusable only when their Application API host matches the provisioning app’s SAP SuccessFactors API host. It also adds the Application ID URI format and compatibility details for the September 15, 2026 update.

1 October 2026
1

Harden Update Ad Fs Pingfederate

Feature updateAction required

The required Microsoft Entra Connect version changed from 2.5.79.0 to 2.6.84.0 or later. The documentation also now requires application-based authentication to maintain directory synchronization and avoid service disruptions.

1 October 2026
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