Import Sequence Number is an internal field (whole number), that acts as a unique identifier of the data import or data migration that created this record that ensures data consistency and traceability during data import/migration.

Here when we imported around 50 contact records from myFile0.csv, without specifying any value or mapping import sequence number, the system generated an import sequence number and associated it with all the 50 records created using the import.

Next, we imported 3 more records, and this time we manually specified the value for the import sequence number.

We could see the record created with the value we had specified.

Next, we again removed the import sequence number and imported it.

We can see the record created with an auto-generated sequence number i.e. 3

On manually created records from the application, we can see the value being null for it.

As we can see, the primary function of the import sequence number is to track which records were created during a specific import. It allows us to identify records created through import vs manually entered. It can also be used for troubleshooting if there are certain records not created during the import process. When migrating data from another system we can include a corresponding import sequence number in our source data. This can help establish a one-to-one link between the source record and the newly created record inside Dataverse, allowing better handling of failed rows.

Check out – Dynamics CRM Data Migration Tip Using the Import Sequence Number Field

Hope it helps..

As we are aware the classic themes do not apply to the new modern refreshed look, however using the new modern themes at least for now we can modify the app header.

For this 1st we need to create an XML Web Resource with the below tags that apply to the AppHeaderColors tag. We can specify the colors of our choice.

<AppHeaderColors
  background="#151515"
  foreground="#FFFFFF"
  backgroundHover="#A91D3A"
  foregroundHover="#FFFFFF"
  backgroundPressed="#C73659"
  foregroundPressed="#FFFFFF"
  backgroundSelected="#F05941"
  foregroundSelected="#FFFFFF"
/>

Below is our web resource created for it.

Next, add the Override app header colors setting definition to the solution

And for the environment value specify the schema name of the web resource.

Save and Publish the customizations.

Before –

After –

Get more details on modern themes

Also check out the wondeful XrmToolBox Plugin – Modern Theme Builder https://www.xrmtoolbox.com/plugins/Greg.Xrm.ModernThemeBuilder/

Hope it helps..