The Invitation Could Not Be Sent Please Try Again 668269003

Some Microsoft Office users are encountering the "Fault while preparing to send sharing message" error while trying to share their Calendar by sending an invite from within the awarding. This is reported to occur whenever the user tries to share any agenda, even the ones that are newly created. The error is typically encountered with, Outlook 2007, Outlook 2010 and Outlook 2016.

Error While Preparing to send Sharing Message — Fault While Preparing to ship Sharing Bulletin

Notation: Affected users report that sharing the Calendar through Office365 is successful as the recipient receives the calendar invitation through email.

What causes the Fault While Preparing to Send Sharing Message

We investigated the upshot and looked into diverse user reports to pinpoint the symptoms and determine the most probable causes. Hither'due south a list with potential culprits that might facilitate the bogeyman of the "Error while preparing to send sharing message" issue:

Office file corruption – The error can occur because some Office files that are responsible for creating a bridge between Outlook and your Calendar app became corrupted and are preventing the process from completing.
An installed add-in is interfering with the sharing part – If you installed outdated or experimental add-ins for Outlook, i of them might be crashing the Calendar sharing function.
Permissions of the Agenda folder are damaged – This is an issue that is quite mutual on Windows 10. Almost of the time, it occurs because an entry chosen PR_MEMBER_NAME is seen every bit a duplicate.

If you're trying to resolve this particular result, this article will provide you with a collection of constructive troubleshooting steps. Keep downwardly as we'll feature a serial of methods that accept helped users in a like state of affairs to resolve the issue. For the best results, follow them in the order that they are presented. Permit's brainstorm!

Method i: Investigate & remove intrusive add-ins

Permit's start by making sure that the issue is not being created by one of the add-ins that you previously installed. A lot of users accept reported that the issue was fixed as shortly equally they got rid of their installed add-ins.

Of class, if you're using a lot of add-ins with your work, uninstalling each of them based on a hunch is less than ideal. Luckily, there's a way to verify whether an add-in is causing the "Fault while preparing to send sharing bulletin" fault. Follow the guide down beneath to verify if one of the add-ins is causing the issue and uninstall the one responsible for the issue:

Printing Windows key + R to open upward a run dialog box. And then, type "outlook.exe /safe" and hit Enter to open Microsoft Outlook in Safe Mode. This command will open Outlook in Condom Mode, which will commencement the program with only the necessary components – add together-ins and other enhancements volition not be permitted to start.

Run dialog: outlook.exe /safety
Wait until Outlook opens in Safe Fashion, the try to send a calendar invite again from within the program. If the process is successful this fourth dimension, information technology's articulate that one of the add-ins is causing the result. In this case, go on down with the steps beneath. Otherwise, jump straight to Method 2.
Close the Safe Mode version of Outlook and open the awarding again normally.
In Microsoft Outlook, go to (using the ribbon at the top) and click on Options.
In the Outlook Options bill of fare, click on Add-ins from the right pane. Then, go to the bottom of the screen, apply the drib-down menu to select COM Add-ins and click the Go push.
Start by removing the checkmarks of every available add-in. Then, systematically enable each of them i past 1 and while trying to send Calendar invites until y'all figure out which add-in is responsible.
One time y'all manage to identify your culprit, select information technology from the COM Add together-ins window and click the Remove button.
Restart Outlook and the issue should stay resolved permanently.

If this method wasn't applicative, continue down with the next method below.

Method two: Reinstalling the Office suite

Some affected users have managed to get the issue resolved by reinstalling the Role suite. In about cases, this process is reported to be successful even if the Microsoft Office repair sorcerer was not able to get the effect resolved.

Hither's a quick guide on reinstalling the Office suite:

Press Windows key + R to open upward a Run dialog box. Next, type "appwiz.cpl" and hitting Enter to open up upwardly Programs and Features.

Run dialog: appwiz.cpl
Inside the Programs and Features wizard, gyre down through the application list to locate Microsoft Office Entry.
Right-click on it and click on Uninstall, then follow the on-screen prompts to uninstall the application suite from your system.
Insert the Office installation media (or open up the installation executable) and re-install the whole suite along with Microsoft Outlook.
Reboot your machine and check whether the consequence is resolved at the next startup.

If this method wasn't able to resolve the error in your particular scenario, continue downward with the next method below.

Method iii: Using the Agenda Permission button

Some affected users reported that they managed to find a workaround in using the Agenda Permission button to grant permissions straight. Just go along in mind that this solution is merely a workaround and volition not fix the functionality of the Share Calendar push.

TheCalendar Permission button is located in the immediate vicinity of the Share Calendar button. To make apply of this workaround, simply click on Calendar Permission and use the next menu to grant outside permissions to other users.

You can then click Add from the next menu to grant Calendar permission to other users. They should receive the invitation via electronic mail, only the same as if you lot were to apply the Share Calendar button.

Method four: Deleting all saved Outlook logins via Windows Credential Manager

A couple of users have reported that the result was stock-still afterwards they used the Windows Credential Manager to delete all saved logins for Outlook and Exchange. This was reportedly successful in restoring the functionality of the Share Calendar push after the user reinserted their credentials in Outlook.

Here's a quick guide on using the Windows Credential Manager to delete all Outlook & Exchange saved logins:

Press Windows key + R to open up up a Run dialog box. Next, type or paste "control /name Microsoft.CredentialManager" to open up the Credential Manager Windows application.

Run dialog: control /name Microsoft.CredentialManager
Under Manage your credentials, click on Windows Credentials.
Whorl down to Generic Credentials and remove every entry that mentions Function, Outlook or Substitution. You tin do then past expanding the drop-down menu associated with each entry and choosing Remove.

Expand Credential Managing director's entry drib-down menu and click on Remove
Once every associated entry has been removed, close Credential Manager and restart your auto.
At the side by side startup, open Outlook and reinsert your log-in credentials. Y'all should be able to share your Calendar without issues later on you log dorsum in.