Microsoft Bing Crawler Blocked

Hi sandro.

Hmm that is strange.
I did a whois for one of his IP Adresses and it resolvs to Microsoft Incorporation.
Here is a whois for his first ip address he posted:
It did not resolv back as writen in the docs becouse they at Microsoft guess maked a mistake but the IP Adresses from where the Crawler request the Pages are legit.

52.250.106.194
NetRange: 52.224.0.0 - 52.255.255.255
CIDR: 52.224.0.0/11
NetName: MSFT
NetHandle: NET-52-224-0-0-1
Parent: NET52 (NET-52-0-0-0-0)
NetType: Direct Assignment
OriginAS:
Organization: Microsoft Corporation (MSFT)
RegDate: 2015-11-24
Updated: 2015-11-24
Ref: https://rdap.arin.net/registry/ip/52.224.0.0

OrgName: Microsoft Corporation
OrgId: MSFT
Address: One Microsoft Way
City: Redmond
StateProv: WA
PostalCode: 98052
Country: US
RegDate: 1998-07-10
Updated: 2017-01-28
Comment: To report suspected security issues specific to traffic emanating from Microsoft online services, including the distribution of malicious content or other illicit or illegal material through a Microsoft online service, please submit reports to:
Comment: * https://cert.microsoft.com.
Comment:
Comment: For SPAM and other abuse issues, such as Microsoft Accounts, please contact:
Comment: * [email protected].
Comment:
Comment: To report security vulnerabilities in Microsoft products and services, please contact:
Comment: * [email protected].
Comment:
Comment: For legal and law enforcement-related requests, please contact:
Comment: * [email protected]
Comment:
Comment: For routing, peering or DNS issues, please
Comment: contact:
Comment: * [email protected]
Ref: https://rdap.arin.net/registry/entity/MSFT

OrgAbuseHandle: MAC74-ARIN
OrgAbuseName: Microsoft Abuse Contact
OrgAbusePhone: +1-425-882-8080
OrgAbuseEmail: [email protected]
OrgAbuseRef: https://rdap.arin.net/registry/entity/MAC74-ARIN

OrgTechHandle: MRPD-ARIN
OrgTechName: Microsoft Routing, Peering, and DNS
OrgTechPhone: +1-425-882-8080
OrgTechEmail: [email protected]
OrgTechRef: https://rdap.arin.net/registry/entity/MRPD-ARIN

Here is a Screen Shot of my Firewall Blocked Request in the last 24 Hours filtered by the BingBot Problem:

As you see nearly 200 Request alone in the last 24 Hours were blocked by the Firewall for the IP Address which belongs to Microsoft.

whois 51.143.124.155

inetnum: 51.140.0.0 - 51.145.255.255
org: ORG-MA42-RIPE
netname: MICROSOFT
descr: Microsoft Limited UK
country: GB
admin-c: DH5439-RIPE
tech-c: MRPA3-RIPE
status: LEGACY
mnt-by: RIPE-NCC-LEGACY-MNT
mnt-by: MICROSOFT-MAINT
created: 2015-05-21T17:21:54Z
last-modified: 2016-07-25T09:38:58Z
source: RIPE

organisation: ORG-MA42-RIPE
org-name: Microsoft Limited
org-type: LIR
descr: Microsoft Corporation AS8075
descr: To report suspected security issues specific to
descr: traffic emanating from Microsoft online services,
descr: including the distribution of malicious content
descr: or other illicit or illegal material through a
descr: Microsoft online service, please submit reports
descr: to:
descr: * https://cert.microsoft.com
descr: For SPAM and other abuse issues, such as Microsoft
descr: Accounts, please contact:
descr: * [email protected]
descr: To report security vulnerabilities in Microsoft
descr: products and services, please contact:
descr: * [email protected]
descr: For legal and law enforcement-related requests,
descr: please contact:
descr: * [email protected]
descr: For routing, peering or DNS issues, please
descr: contact:
descr: * [email protected]
address: One Microsoft Way
address: WA 98052
address: Redmond
address: UNITED STATES
phone: +1 425 882 8080
fax-no: +1 425 936 7329
abuse-c: MAC274-RIPE
mnt-ref: RIPE-NCC-HM-MNT
mnt-ref: MICROSOFT-MAINT
mnt-by: RIPE-NCC-HM-MNT
mnt-by: MICROSOFT-MAINT
created: 2004-04-17T12:18:10Z
last-modified: 2020-07-01T16:22:30Z
source: RIPE # Filtered

role: Microsoft Routing, Peering, and DNS
address: One Microsoft Way
address: Redmond, WA 98052
nic-hdl: MRPA3-RIPE
mnt-by: MICROSOFT-MAINT
created: 2014-08-26T16:25:24Z
last-modified: 2014-08-26T16:25:24Z
source: RIPE # Filtered

person: Divya Quamara
address: One Microsoft Way
address: Redmond, WA 98052
phone: +1-425-882-8080
nic-hdl: DH5439-RIPE
mnt-by: MICROSOFT-MAINT
created: 2014-08-26T16:24:14Z
last-modified: 2016-02-19T07:09:41Z
source: RIPE

% Information related to ‘51.140.0.0/14AS8075’

route: 51.140.0.0/14
origin: AS8075
descr: Microsoft
mnt-by: MICROSOFT-MAINT
created: 2020-07-22T15:05:24Z
last-modified: 2020-07-22T15:05:24Z
source: RIPE # Filtered

This looks like a old Problem that a lot of People faced.
I solved the Problem Temporary following this How To here.
For the Moment i dont have this Firewall Blocking anymore but People
from cloudflare should really reach out to Microsoft and solve this Problem.
It costed me several Ranking Positions in Bing and DuckDuck go allready.

The provided Answer this Request do not resolve back to what the Docs say could be wrong and outdated.
it could be also very well be that this is some kind od Developers testing the newest Version of the Crawler before deploying it.

I think the most plausible answer to this Problem is that this is actually the Microsoft Advertising Team craweling the Website. I have a registered account with this email at Microsoft Advertising becouse i wanted do advertising at DuckDuckGo and they do crawl website to check if everything is good.

I would clearly not leave this situation like now.
Will do more diging why this happened especially the last 7 Days such much.
Before it was not that much Intense.
Guess Bing is maybe creating a New Index and doing a Core Index Update.
Then it would be very very bad …