Imagery Layer not loading onto Web Map after building overviews

[sophered]

Hello!!! After finally successfully creating a mosaic dataset and properly registering the data source so that it can be uploaded as an image service, I noticed that the images would only be viewable at a very close scale. I used the "Build Overviews" tool in ArcGIS Pro to help with this issue BUT now after republishing, I'm running into this error whenever I try to view the layer in a web map in portal.

I'm wondering if there are any other solutions to this issue, possibly removing the overviews and using caching instead? I'm very inexperienced with tile caching so I'm unsure of the benefits/disadvantages of using that method instead. Here's some background: These images are scanned maps and I have around 1500 of them to add to the mosaic dataset. I need to be able to incorporate the web map in an application that allows users to search/query the images by certain attributes, but I've been getting caught up with setting up the mosaic dataset and now incorporating it into a web map. Any help + documentation is very much appreciated!

[MichaelVolz]

Do you have Image Server role of ArcGIS Server to create an image service from the Raster Mosaic Dataset (RMD)?

[sophered]

@MichaelVolz  Yes I do!! I was able to publish it as an image service successfully, the issue was that it was only viewable at a VERY close scale. I also noticed that configuring popups on the image service only worked in old map viewer and not new, but im trying to get the scale issue sorted out first before addressing that haha. 

[MichaelVolz]

Are you storing your raw imagery and overviews in the same location on a shared network drive?

[sophered]

Yes they were saved on the same network drive.

[MichaelVolz]

Are you using mapped network drive letter or unc paths when saving the imagery and subsequent overviews?  A mapped network drive would work for the RMD, but only unc paths are supported for imagery services.

[sophered]

I am currently using UNC paths for everything! I did try uploading the image service before building the overviews and it was working fine then. However, after building overviews and reuploading, i got that error 

[sophered]

I am currently using UNC paths for everything! I did try uploading the image service before building the overviews and it was working fine then. However, after building overviews and reuploading, i got that error 

[MichaelVolz]

What do you mean by reuploading (I'm confused)?  Are you not just adding the image service to the webmap by the service URL?

[sophered]

just an fyi, im pretty inexperienced with anything involving imagery haha. i had an earlier version that i published as an image service (using publish as web layer) but after looking into it i think i had actually copied the one that was working to the server. so it most likely has everything to do with registering it and NOT the overviews actually. i published a REGISTERED version after building overviews and that registered version did not give me any "data is not registered with the server" errors when publishing so i thought i fixed all of the paths. Is there anything that would cause for the errors to not arise, but for it to not be able to be added as a layer to the map?