Power Platform Community Forum Thread Details

Hi @apangeles_,

Pros of dynamic Site Address and List Name

Portability
You can point the same flow at different sites or lists per run, per environment, or per business unit. Useful for templates and “one flow for many clients." ”.
Less duplication
One flow replaces many near-identical flows. Maintenance gets simpler when the logic is the same.
Works well with solutions and ALM
If you drive the values from environment variables, a config list, or Dataverse configuration rows, you get cleaner Dev Test Prod promotion.
Better for multi-tenant or multi-site operations
If your input arrives with a site URL or list identifier, dynamic values keep the flow flexible.

Cons and the real gotchas

The designer needs to read metadata
Many SharePoint actions load site and list metadata at design time to show columns and content types and to validate inputs.
If Site Address or List Name becomes dynamic, the designer often cannot resolve the target, so it either

stops showing fields, or
tries to resolve using your connection and fails, or
breaks advanced editors that depend on list schema.

“403 Forbidden” when editing is common
A flow can keep running fine and then become hard to edit.
Typical reasons:

The connection used in the SharePoint actions belongs to a user who lost access to the site or list.
You, as an editor, do not have access to the site the dynamic value resolves to, so the designer’s metadata call fails with 403.
Conditional access, MFA changes, token expiry, or a re-auth requirement breaks the connection used for metadata calls.
The site was moved/renamed, the list was renamed, or permissions changed, and the dynamic value now points somewhere your connection cannot read.

Key point: run-time access and design-time access are different experiences. Editing triggers schema lookups, and those lookups can fail even if past runs succeeded.

Harder troubleshooting
When the site/list changes per run, failures become data-dependent. You spend more time proving which input pointed where.
Hidden coupling to permissions
Dynamic routing means your flow effectively needs permissions across all possible target sites/lists. If one target is missing, you get intermittent failures.
Some actions do not behave well with dynamic list names
Examples: actions that expose column pickers, OData filter builders, and file property expansions. They assume a known list schema.

What to look out for when using this model
Permissions and ownership

Use a service account connection (or a dedicated connection owned by the team), not a single person’s account.
Ensure flow owners also have at least read access to every site the flow might touch, or accept that editing will break for some owners.
If the flow is in a solution, use connection references so ownership changes do not silently break things.

How you store the target

Prefer stable identifiers.
- The site URL is fine if the site won’t move.
- For lists, a list GUID is safer than a display name. Display names change; GUIDs do not.
If you must use names, keep them in a controlled config source and avoid user-entered free text.

Design-time schema dependency

For “Get items / Create item / Update item," where you rely on column pickers, dynamic targets are risky.
Safer pattern:
- Keep the SharePoint action pointing to a fixed “known” list when you need schema-bound fields, or
- Switch to “Send an HTTP request to SharePoint” + Parse JSON when you need fully dynamic list targeting and want to avoid the designer schema lookups.

Connection health and policy

Watch for expired connections after password changes or Conditional Access policy updates.
DLP policies and connector restrictions can block edits even when runs still show as succeeded historically.

Environment moves

If you promote across environments, do not hardcode dynamic strings inside actions.
Use environment variables (site URL, list GUID) so you can swap targets per environment without editing every action.

Practical recommendations
If you want flexibility with fewer surprises:

Use environment variables for Site URL and List GUID.
Use a service account connection reference.
Keep SharePoint actions schema-light where possible.
For highly dynamic list routing, use SharePoint REST via “Send an HTTP request to SharePoint” and handle the response with Parse JSON.

If you want a stable designer experience:

Avoid dynamic site addresses and list names in actions where you must pick columns from the UI.
Use separate flows per list when schemas differ materially.

When a flow is already “stuck” with 403 in the editor
Try these in order:

Re-authenticate or replace the SharePoint connection used by the actions (often fixes the 403).
Have a tenant or environment admin take ownership, then update the connection.
If you can open any action, switch Site Address/List Name back to static temporarily, save, then re-introduce dynamic using variables or environment variables.
If the designer is fully blocked, export the flow (package/solution), then re-import and rebind connections, or recreate the broken actions in a new flow and move logic across.

Thank you!
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