Note: Affected users report that sharing the Calendar through Office365 is successful as the recipient receives the calendar invitation through email.
What causes the Error While Preparing to Send Sharing Message
We investigated the issue and looked into various user reports to pinpoint the symptoms and determine the most likely causes. Here’s a list with potential culprits that might facilitate the apparition 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preventing the process from completing.An installed add-in is interfering with the sharing function – If you installed outdated or experimental add-ins for Outlook, one of them might be crashing the Calendar sharing function.Permissions of the Calendar folder are damaged – This is an issue that is quite common on Windows 10. Most of the time, it occurs because an entry called PR_MEMBER_NAME is seen as a duplicate.
If you’re trying to resolve this particular issue, this article will provide you with a collection of effective troubleshooting steps. Continue down as we’ll feature a series of methods that have helped users in a similar situation to resolve the issue. For the best results, follow them in the order that they are presented. Let’s begin!
Method 1: Investigate & remove intrusive add-ins
Let’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 have reported that the issue was fixed as soon as they got rid of their installed add-ins. Of course, 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 “Error while preparing to send sharing message” error. Follow the guide down below to verify if one of the add-ins is causing the issue and uninstall the one responsible for the issue: If this method wasn’t applicable, continue down with the next method below.
Method 2: Reinstalling the Office suite
Some affected users have managed to get the issue resolved by reinstalling the Office suite. In most cases, this procedure is reported to be successful even if the Microsoft Office repair wizard was not able to get the issue resolved. Here’s a quick guide on reinstalling the Office suite: If this method wasn’t able to resolve the error in your particular scenario, continue down with the next method below.
Method 3: Using the Calendar Permission button
Some affected users reported that they managed to find a workaround in using the Calendar Permission button to grant permissions directly. But keep in mind that this solution is merely a workaround and will not fix the functionality of the Share Calendar button. The Calendar Permission button is located in the immediate vicinity of the Share Calendar button. To make use 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 email, just the same as if you were to use the Share Calendar button.
Method 4: Deleting all saved Outlook logins via Windows Credential Manager
A couple of users have reported that the issue was fixed after 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 button 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:
FIX: Remove Send a Smile / Send a Frown from Internet Explorer 11Fix: iMessage needs to be enabled to send this messageHow to Fix An Error Occurred While Preparing the Installation on MacHow to Fix Screen Flickering While Sharing Individual Screens on Microsoft Teams…
