Windows 10: Is +1 888 902 6765 a valid windows helpline number

For the fifth time since the start of this year, I'm making a new outlook profile on a client's computer and reconfiguring all their accounts due to what I'm sure is the infamous startup error reading:"Cannot start Microsoft Outlook. Cannot open the Outlook window. The set of folders cannot be opened. The operation failed."I'm properly sick of dealing with this, so in a last ditch effort I'm reaching out here. Short of installing Thunderbird, what can be done so that I never have to make another Outlook profile on this user's machine? Why does this error insist on continuing to pop up? What

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Helpline number

Can you verify a phone number I received on my laptop as a security helpline..?1-888-336-7017

 

Is 18053928881 a valid windows helpline number

Is 18053928881 a valid windows helpline number?

 

is telephone # 1-888-229-0684 a valid # for MS

It's easy enough to find out ... put the number into the search engine of your choice - mine is Google - and you'll quickly find out if the number belongs to Microsoft.