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![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(172.8, 67%, 26%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EE%3C/text%3E%3C/svg%3E)
Hi,
Good day. I am new to the sharepoint. Currently I have an existing sharepoint farm with 2 WFE (WFE1 & WFE2), 1 App, and 1 SQL Servers, using Network Load Balancing feature with 1 WFE as primary role, another as backup role.
My sharepoint site is tested all working so far.
Besides, I have setup my sharepoint site with https secure connection as well, and tested workable.
However, there is 1 issue i am currently facing in my WFE1 server, where using WFE1 as primary role, I am not able to view my excel files in browsers, whereas there is no issue to view excel file in browsers when using WFE2 as primary.
All my sharepoint servers are currently installed and running with CU update of August (KB4484485)
Hi,
Good day. I am new to the sharepoint. Currently I have an existing sharepoint farm with 2 WFE (WFE1 & WFE2), 1 App, and 1 SQL Servers, using Network Load Balancing feature with 1 WFE as primary role, another as backup role.
My sharepoint site is tested all working so far.
Besides, I have setup my sharepoint site with https secure connection as well, and tested workable.
However, there is 1 issue i am currently facing in my WFE1 server, where using WFE1 as primary role, I am not able to view my excel files in browsers, whereas there is no issue to view excel file in browsers when using WFE2 as primary.
Appreciate if have any ideas to fix this issue.
Steps has been taken so far to try fix this but still no luck
![34972-wfe1-uls-log2.jpg][2] 
Hi, @EN88 ,
Thanks for your very detailed information and troubleshooting steps. It seems the settings for Excel web service application is fine, without any issue. The error message tends to be an issue with security request time-out, which could be an issue of Load balancer. Have you checked the event viewer? There may be more information about related errors. And what error do you see in WFE which stops the page from loading the Excel file?
Here is a thread which may be a reference for you:
https://social.technet.microsoft.com/Forums/azure/en-US/1fe572f6-ddfe-4a20-b37e-031fe3c929ea/intermittent-error-for-excel-files-while-accessing-through-excel-web-access?forum=sharepointadmin
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Hi,
Can you advise on how and where should i go to check the load balancer issue?
For the security request time-out matter you said, anything i can check on this?
It is weird that my WFE2 had no issue to view Excel in browser, only happened to my WFE1.
As i checked from my event viewer log, there is not more excel service application error except for above ULS Viewer log which is keep on generating when i use WFE1 to try view excel in browser.
Thank you.
Hi, @EN88 ,
There are cases where the load balancer will block requests from certain IP which cause issues. Just like the error message mentioning, there is an issue communicating with Excel Calculation Service, and we have error showing timeout on security requests. For such issue, have a try to contact with the load balancer provider and make them have a check on the traffic. If it is an urgent issue, I will suggest you to open a support ticket about it.
Note: If you have any update about the issue, please update the original post, and you can comment under the reply to add more information
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(201.6, 95%, 29%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EJ%3C/text%3E%3C/svg%3E)
Negative.
Once a time I do have make the DNS pointing for my sharepoint directly to that problematic WFE, instead of my NLB Cluster IP. It is still getting the same issue. I don't think this issue is related to my NLB load balancer.
This issue has been happened since several months ago, until now I am still have no idea on how to fix this. Can you advise on how to fix this?
I am appreciate and grateful to you if u can solve my issue.
Thank you.
Hi,
Additional question: I should not enable the excel service in both my WFE right? It is because i am just start the service in my Application Server all the time
Currently i have no clue on how to fix my WFE1 on this excel viewer issue..
Hi, refer to above image attached, that's the only error generated from event viewer and browser when view excel file.