Update sentinel-service-limits.md

Author: yelevin

articles/sentinel/sentinel-service-limits.md

@@ -23,8 +23,8 @@ The following limit applies to analytics rules in Microsoft Sentinel.
 | [Entity mappings](map-data-fields-to-entities.md) | 10 mappings per rule | None |
 | [Entities](map-data-fields-to-entities.md) identified per alert<br>(Divided equally among the mapped entities) | 500 entities per alert | None |
 | [Entities](map-data-fields-to-entities.md) cumulative size limit | 64 KB | None |
-| [Custom details](surface-custom-details-in-alerts.md)    | 20 details per rule | None |
-| [Custom details](surface-custom-details-in-alerts.md) and [alert details](customize-alert-details.md)<br>combined cumulative size limit | 64 KB | None |
+| [Custom details](surface-custom-details-in-alerts.md) | 20 details per rule<br>50 values per detail<br>2 KB cumulative size | None |
+| [Alert details](customize-alert-details.md) | 50 values per overridden field<br>5 KB per field for `Description` and collections<br>256 bytes per field for `AlertName` and non-collections | None |
 | Alerts per rule<br>Applicable when *Event grouping* is set to *Trigger an alert for each event* | 150 alerts | None |
 | Alerts per rule for NRT rules | 30 alerts | None |