The error indicates Outlook is calling a function that does not exist in a Windows/Office DLL on the current system, similar to other “procedure entry point … could not be located” issues.
From the available information, the supported fixes for comparable Outlook/Office entry‑point errors are:
- Make sure Outlook/Office is fully updated
- Open any Office app (Word, Outlook classic if it will start).
- Go to File > Office Account > Update Options > Update Now.
- Install any offered updates and restart Outlook.
- If Outlook will not start at all, run an Online Repair of Office
- Close all Office apps.
- Open Control Panel > Programs and Features (or Settings > Apps > Installed apps on newer Windows).
- Select Microsoft 365/Office, choose Change.
- Choose Online Repair (not Quick Repair) and let it complete.
- This is the same approach recommended when Outlook/Word DLL entry‑point errors occur after an update.
- If the problem started immediately after uninstalling or downgrading Office/Outlook
- A mismatched or incorrect type library or DLL registration can cause entry‑point errors.
- For Outlook 2013, a known case after uninstalling Outlook 2016 is fixed by:
- Opening regedit.
- Deleting the key
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\TypeLib\{00062FFF-0000-0000-C000-000000000046}\9.6.
- Running an Online Repair of Office.
- Only perform registry edits if comfortable and after backing up the registry, as incorrect changes can cause system problems.
- If the error is tied to an add‑in
- Disable third‑party add‑ins:
- Start Outlook in safe mode (for example, by holding Ctrl while starting Outlook classic) so add‑ins do not load.
- If Outlook opens in safe mode without the error, disable add‑ins from File > Options > Add‑ins, then COM Add‑ins > Go, and uncheck non‑Microsoft add‑ins.
- If none of the above resolves it
- Completely uninstall Office from Apps & Features/Programs and Features.
- Manually remove remaining Office folders under Program Files and user profile locations as appropriate.
- Reinstall Office, then update it and test Outlook again.
If the issue persists after a full Online Repair or reinstall, collect the exact Windows version, Outlook/Office version, and the full error text, and then contact Microsoft Support or post on the Outlook Tech Community/Answers forum for targeted assistance.
References: