Exceeds Threshold

The problem you have is that even though you're trying to limit the number of rows returned to 1000 (under the view threshold), the query has to address all the items due to the Where clause you're using. The 'FSObjType' column is not indexed.

It looks like all you're trying to do is return all items, excluding folders. If so, there's a better way: Instead of using a Scope of "RecursiveAll", which returns all items and folders, just use a Scope of "Recursive", which returns only items and not folders. You can then remove the Where clause. So:

<View Scope='Recursive'><RowLimit>1000</RowLimit>
<ViewFields><FieldRef Name = 'ID' /><FieldRef Name = 'Title' /><FieldRef Name = 'WebSeguros_DocumentoID' /><FieldRef Name = 'WebSeguros_ADM_ID' /><FieldRef Name = 'WebSeguros_TipoDocumento' /><FieldRef Name = 'Created' /><FieldRef Name = 'Author' /><FieldRef Name = 'Modified' /><FieldRef Name = 'Editor' /><FieldRef Name = 'FileLeafRef' /><FieldRef Name = 'FileDirRef' /></ViewFields></View>

@Marta,

This is a known issue called list view threshold. Below blogs explains this issue in detailed:

• https://natechamberlain.com/2018/05/21/how-to-resolve-sharepoint-list-view-threshold-error-the-view-cannot-be-displayed-because-it-exceeds-the-list-view-threshold/
• https://support.microsoft.com/en-us/office/manage-large-lists-and-libraries-b8588dae-9387-48c2-9248-c24122f07c59?ui=en-us&rs=en-us&ad=us

To acquire all sub folers(or files) in a specified folder using caml, please refer to below thread:

• https://stackoverflow.com/questions/61643974/sharepoint-csom-api-doesnt-throw-threshold-exception

BR

For SP on-prem, you can disable the threshold for a specific list or library using PS Script

Add-PSSnapin Microsoft.SharePoint.PowerShell -ErrorAction SilentlyContinue

$WebApplication = Get-SPWeb “https://WebURL/sites/abc/siteA/”
$List = $WebApplication.Lists["My List"]
$List.EnableThrottling = $false
$List.Update() 

You Can increase the list view threshold to solve this problem : 1- Go to Central Admin 2-Under “Application Management” click “Manage Web Applications” 3-Select the web application for which you’re adjusting the list view threshold 4-from the upper menu inSelect “General Settings” then “Resource Throttling” 5- in the list view threshold : change the limit ex: enter 1000

Then it will work