Trusted Add-in Catalog (Trust Center)

IT guide: publish x0’s Excel and Word Office.js add-ins through
File → Options → Trust Center → Trusted Add-in Catalogs, or upload the same
XML to a SharePoint app catalog / Centralized Deployment.

Portal page: /addin/catalog/ · Bundle zip: /addin/catalog.zip

Trust Center fields

Field	What to enter
Catalog Url	UNC of the folder that contains the manifest XML files (e.g. `\\fileserver\OfficeAddins`), or SharePoint site collection URL (e.g. `https://contoso.sharepoint.com/sites/AppCatalog`). Not an `https://…/manifest.xml` URL.
Trusted Catalog Address	Same value after Add catalog.
Catalog Type	Network share or SharePoint.
Show in Menu	Must be checked or SHARED FOLDER stays empty.

Why newer Excel asks for a “URL”

SharePoint catalogs use an https:// site URL. Network shares still use a
UNC path (\\server\share). Excel’s Catalog Url box accepts both; catalog
type is inferred from the address. A plain website folder on x0 is not
a valid Catalog Url — x0 hosts the manifests and a bundle zip; your
tenant hosts the catalog address.

Bundle zip

Download /addin/catalog.zip. Contents:

Path	Purpose
`manifests/x0-excel-addin.xml`	Excel catalog entry
`manifests/x0-word-addin.xml`	Word catalog entry
`Install-x0-TrustedCatalog.ps1`	Copy manifests + write Trust Center registry
`README.md`	Same steps, with screenshot placeholders
`screenshots/`	Drop PNG captions listed in the README

Manifest task panes already point at this portal host (PORTAL_BASE_URL).

PowerShell automation

Yes — Trust Center “Show in Menu” catalogs are per-user registry entries under:

HKCU\Software\Microsoft\Office\16.0\WEF\TrustedCatalogs\{e7b2a91c-5d4f-4a8e-9c31-2f6d8b0e4a77}

Value	Meaning
`Id`	Same GUID (stable so re-runs update one row)
`Url`	UNC catalog path
`Flags`	`dword:1` = Show in Menu

From the unzipped bundle (close Excel/Word first):

.\Install-x0-TrustedCatalog.ps1
.\Install-x0-TrustedCatalog.ps1 -CatalogPath '\\fileserver\OfficeAddins'
.\Install-x0-TrustedCatalog.ps1 -DownloadFromPortal

Default local folder: %ProgramData%\x0\OfficeAddinCatalog. If you run elevated,
the script can create an SMB share \\PC\x0OfficeAddins; otherwise it falls back
to an admin-share style UNC for the local machine.

Microsoft documents the same registry shape here:
Sideload from a network share.

Activate in Excel

Restart Excel after Trust Center / script changes.
Home → Add-ins → Advanced → SHARED FOLDER.
Add x0 connect.
Home ribbon → Connect x0 → sign in → token → load table.

See excel-addin.md.

Activate in Word

Restart Word.
Home → Add-ins → Advanced → SHARED FOLDER.
Add x0 Word.
Home ribbon → Connect x0 (same x0 login/token as Excel).

See word-addin.md.

Manifest URLs (not Catalog Url)

Add-in	URL
Excel	`/addin/manifest.xml`
Word	`/word/addin/manifest.xml`

Use these for Centralized Deployment (Microsoft 365 admin center) or when
uploading into SharePoint. Prefer Centralized Deployment for org-wide production;
network-share catalogs are Windows-oriented and Microsoft marks them as a
testing / limited path.