Microsoft Office 365 (version 2301 Build 16026.... May 2026

: Critical patches to protect against macro-based vulnerabilities.

: This indicates the year (2023) and the month (01 - January) of the release. Microsoft Office 365 (Version 2301 Build 16026....

: In any Office app (like Word), go to File > Account . Your version and build will be listed under "About Word" or "About Excel" as described on Microsoft Support. Your version and build will be listed under

: If you want the latest features (like AI-powered tools), click Update Options > Update Now in that same menu to move beyond the 2023 version Microsoft Update Instructions . Version Breakdown

If you are seeing this text while troubleshooting or checking your software status, here are two quick actions you can take:

The text you provided refers to a specific update release for (now Microsoft 365) from early 2023. Version Breakdown