Context
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I have 8 calendar accounts.

Description of the problem
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Each time the network seems available but is actually not, as in hotels before using connection vouchers or using VPNs which require specific proxy setting to access the outside world, the 8 passwords are requested.

Proposed changes
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1) Distinguish between "wrong password" and "server not reached".
2) If "wrong password", first spawn an unobtrusive notification. Clicking on the notification would spawn the popup password boxes.
3) If "server not reached", either consider it as an hint for a non working connection and notify. Or simply do nothing : most of the time, the user knows when the connection is not working (VPNs, Proxies, web gates, etc.).