Cannot verify or add the calendar to Outlook

We have an Outlook 2007 client who was able to view my shared calendar until
a couple of days ago. Since then the client prompts for a User Name and
Password that always fails (double checked correctness by logging into
office.microsoft.com). It fails three times then returns the message

Cannot verify or add the calendar to Outlook. Make sure the following link
is a valid calendar link:
webcals://<the url to my ICS would be here>

OK button

Does anyone know how to fix this?

I tried to share my calendar with another coworker and neither is able to add
my calendar to their Outlook with the same details as my previous post.

So I deleted the 2 email addresses showing in my "Publish to Internet" ->
"Change Sharing Permissions". Then I did a "Publish to Internet" -> "Share
published calendar" and sent the email to both coworkers.

Same result. They can't click on the email "subscribe" and successfully add
it to their calendars.

Both coworkers have valid Live ID accounts for the email address i sent them.

Any ideas?

"Dave Williamson" wrote:

> We have an Outlook 2007 client who was able to view my shared calendar until
> a couple of days ago. Since then the client prompts for a User Name and
> Password that always fails (double checked correctness by logging into
> office.microsoft.com). It fails three times then returns the message
>
> Cannot verify or add the calendar to Outlook. Make sure the following link
> is a valid calendar link:
> webcals://<the url to my ICS would be here>
>
> OK button
>
> Does anyone know how to fix this?