microsoft outlook/exchange - cannot expand the folder. the set of folders cannot be opened. attempt to login to microsoft exchange has failed.

Question

microsoft outlook/exchange - cannot expand the folder. the set of folders cannot be opened. attempt to login to microsoft exchange has failed.

Mary Ann Scott 0

Adding a new email to Outlook 365. Was 'successfully added'.

Error: cannot expand the folder. the set of folders cannot be opened. Attempt to login to microsoft exchange failed.

please advise how I can access this new email.

Mary Ann

Navneet Kumar 75 Reputation points

2023-09-07T00:10:41.98+00:00

@Mary Ann Scott Could you please provide more insights or may be screenshots ?
Yuki Sun-MSFT 41,376 Reputation points Moderator

2023-09-11T09:29:26.42+00:00

Hi @Mary Ann Scott ，

Just checking in to see if the answer helped. If this answers your query, please don’t forget to click "Accept Answer" which might be beneficial to other community members reading this thread. And, if you have any further query do let us know.

1 answer

Your answer

Navneet Kumar 75 Reputation points

2023-09-07T00:10:41.98+00:00

@Mary Ann Scott Could you please provide more insights or may be screenshots ?
Yuki Sun-MSFT 41,376 Reputation points Moderator

2023-09-11T09:29:26.42+00:00

Hi @Mary Ann Scott ，

Just checking in to see if the answer helped. If this answers your query, please don’t forget to click "Accept Answer" which might be beneficial to other community members reading this thread. And, if you have any further query do let us know.

Answer 1

Hi @Mary Ann Scott ，

Please check it via OWA to make sure the new added mailbox can be accessed properly.

With that confirmed, it's suggested to try turning off Exchange cached mode via File > Account Settings by following steps in this link and check if it can help.

In case the error persists, I'd recommend create a new Outlook profile and see the result. For more details about how to create a new Outlook profile and switch between different profiles, you may refer to: Overview of Outlook e-mail profiles.

If the answer is helpful, please click "Accept Answer" and kindly upvote it. If you have extra questions about this answer, please click "Comment".

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microsoft outlook/exchange - cannot expand the folder. the set of folders cannot be opened. attempt to login to microsoft exchange has failed.

1 answer

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