Queue viewer snapin hangs and Mail flow stops

We are having Exchange 2013 environment with 2 servers. (DAG configured). Everything was working fine until from last 10 days the mail flow stops suddenly. During this time if i login to both server to the check the Queue Viewer, i am getting an error in the mmc as below on both servers.
"FX:{714FA079-DC14-470f-851C-B7EAAA4177C1} Type is not resolved for member Microsoft.Exchange.Configuration"
The mail flow resumes only after restarting both servers.
During this time all the services are running, i am able to access owa and also outlook connection is working fine.

Can anyone have suggestion regarding this issue?
Ahamed SignupsExchange / System AdministratorAsked:
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viktor grantExchange ServersCommented:
Hi Ahamed,

You are logged with an administrator user in Exchange.

Hasin Ahmed ChoudharyExchange AdministratorCommented:
Have you tried using get-queue -server cmdlets?
Does above warning/error shows up at that time too?
Ahamed SignupsExchange / System AdministratorAuthor Commented:
Hello Viktor

 Yes I have logged in with the administrator user.

Hello Hasin

 No I haven't tried the comment... during this issue mail flow is stopped and queue viewer snap in not opening in both servers
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Ahamed SignupsExchange / System AdministratorAuthor Commented:
Hello Hasin

 When I faced the issue again now, I tried the powershell, When I open the powershell itself I am getting the  error which starts as follows
Connecting to remote server failed with the following error message : Access is denied. For more information see _remote_troubleshooting.

I am confused because the account I am using is Administrator account
Hasin Ahmed ChoudharyExchange AdministratorCommented:
Try to run explicit as :Run as admin
Ahamed SignupsExchange / System AdministratorAuthor Commented:
The issue is fixed after installing the correct RBAC (Installed CannedRbacRoleAssignments) ... After a long search i found the article in technet.. The link is here

Hope this helps someone...

Thanks Hasin for your hint to check the powershell during the issue...

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Ahamed SignupsExchange / System AdministratorAuthor Commented:
The solution i provided in the comment resolved the issue
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